# MacHack A list of built-in tools in macOS that you probably didn't know about. ## Table of Contents - [MacHack](#machack) - [Table of Contents](#table-of-contents) - [Commands](#commands) - [java_home](#java_home) - [dot_clean](#dot_clean) - [SafeEjectGPU](#safeejectgpu) - [sharing](#sharing) - [remotectl](#remotectl) - [brctl](#brctl) - [sysadminctl](#sysadminctl) - [ckksctl](#ckksctl) - [otctl](#otctl) - [spctl](#spctl) - [networksetup](#networksetup) - [systemsetup](#systemsetup) - [airport](#airport) - [AssetCacheLocatorUtil](#assetcachelocatorutil) - [AssetCacheManagerUtil](#assetcachemanagerutil) - [seedutil](#seedutil) - [kmutil](#kmutil) - [profiles][#profiles] - [bputil](#bputil) ## Commands ### java_home This tool queries the available Java Virtual Machines from `/Library/Java/JavaVirtualMachines`. ```text $ /usr/libexec/java_home --help Usage: java_home [options...] Returns the path to a Java home directory from the current user's settings. Options: [-v/--version ] Filter Java versions in the "JVMVersion" form 1.X(+ or *). [-a/--arch ] Filter JVMs matching architecture (i386, x86_64, etc). [-d/--datamodel ] Filter JVMs capable of -d32 or -d64 [-t/--task ] Use the JVM list for a specific task (Applets, WebStart, BundledApp, JNI, or CommandLine) [-F/--failfast] Fail when filters return no JVMs, do not continue with default. [ --exec ...] Execute the $JAVA_HOME/bin/ with the remaining arguments. [-X/--xml] Print full JVM list and additional data as XML plist. [-V/--verbose] Print full JVM list with architectures. [-h/--help] This usage information. ``` An example usage of this tool: ```text $ /usr/libexec/java_home -v 11 -a x86_64 /Library/Java/JavaVirtualMachines/adoptopenjdk-11.jdk/Contents/Home ``` ### dot_clean This is an extremely useful built-in utility to delete all useless dot files that macOS creates, such as ._MyFile. Just point it at a folder, and it wipes it free of the cruft! ```text $ /usr/sbin/dot_clean usage: dot_clean [-fmnpsv] [--keep=[mostrecent|dotbar|native]] [directory ...] ``` An example usage of the tool: ```text $ /usr/sbin/dot_clean /Volumes/Shared/MyFiles ``` ### SafeEjectGPU This is a utility for managing GPUs, especially eGPUs. This is what is behind the safe eject functionality of the eGPU in the System UI. It is useful for: - Listing GPUs on the system. - Determining what applications are using a particular GPU. - Ejecting an eGPU safely. - Launching an application on a specific GPU. - Switching an application from one GPU to another. ```text $ /usr/bin/SafeEjectGPU usage: SafeEjectGPU [Commands...] Commands: gpuid # specify gpuid of following commands gpuids ,,... # specify list of gpuids for RelaunchPIDOnGPU command gpus # show all GPUs and their applicable properties apps # show all Apps on specified gpuid status # show status of all specified gpuid Eject # Eject (full eject sequence) on specified gpuid Initiate # Initiate eject sequence on specified gpuid Relaunch # Relaunch lingering AppKit apps on specified gpuid Finalize # Finalize eject sequence on specified gpuid Cancel # Cancel eject sequence on specified gpuid RelaunchPID # RelaunchPID can be used in app testing to send Relaunch stimulus in isolation RelaunchPIDOnGPU # Send Relaunch stimulus to an app with set of limited GPUs to select from, use gpuids LaunchOnGPU # Launch an app from given bundle path with set of limited GPUs, use gpuids zombies # show all zombies (apps holding reference to unplugged eGPU) zcount # show count of (unhidden) zombies Zkill # kill zombies Zrelaunch # relaunch zombies +fallbackGPUEjectPolicy # allow builtin fallbacks to take effect (default) -fallbackGPUEjectPolicy # deny builtin fallbacks Notes: Unspecified gpuid (==0) indicates all "removable" GPUs Capitalized commands may have system-wide effects Non-capitalized commands are informative only See description of Info.plist "SafeEjectGPUPolicy" key. Use values: "ignore", "wait", "relaunch", or "kill" for per-app policy +/-fallbackGPUEjectPolicy can appear multiple times on the commandline and applies to following commands ``` Example of the `gpus` command: ```text $ /usr/bin/SafeEjectGPU gpus gpus 2019-10-13 10:04:58.676 SafeEjectGPU[53035:3374543] Device PreExisted [000000010000778d] AMD Radeon RX 570 2019-10-13 10:04:58.676 SafeEjectGPU[53035:3374543] Device PreExisted [000000010000086b] AMD Radeon Pro 560X 2019-10-13 10:04:58.676 SafeEjectGPU[53035:3374543] Device PreExisted [000000010000081a] Intel(R) UHD Graphics 630 gpuid 0x56ce - Intel® UHD Graphics 630 registryID=0x000000010000081a integrated location - BuiltIn locationNumber - 0 maxTransferRate - 0 gpuid 0x9f05 - AMD Radeon Pro 560X registryID=0x000000010000086b discrete location - BuiltIn locationNumber - 1 maxTransferRate - 0 gpuid 0x5d0e - AMD Radeon RX 570 registryID=0x000000010000778d removable Razer Core X - enclosureRegistryID=0x000000010000776d location - External locationNumber - 4 maxTransferRate - 5000000000 ``` ### sharing This command gives information about File Sharing. It should look similar to the File Sharing section in the Sharing preference pane. ```bash $ /usr/sbin/sharing Usage: sharing -a [options] : create a sharepoint for directory specified by path sharing -e [options] : edit sharepoint named sharing -r : remove sharepoint with name sharing -l : list existing sharepoints options: -A :use share point name for afp. -F :use share point name for ftp. -S :use share point name for smb. -s [] :enable sharing, restricted by flags if specified; flags = 000,001,010 ...111; 1 = share, 0 = do not share; with digits indicating afp, ftp (no longer supported) and smb in that order; default is 101 if -s is specified with no flags. -g [] :enable guest access, restricted by flags if specified; flags = 000,001,010 ...111; 1 = enabled, 0 = disabled; with digits indicating afp, ftp (no longer supported) and smb in that order; default 101 if -g is specified with no flags. -i [] :enable inherit privileges from parent(afp only), restricted by flags if specified; flags = 00,10; 10 = enabled, 00 = disabled; default is 10 if -i is specified with no flags. -n :set record name to use (by default this is the directory name of the shared directory) ``` ### remotectl The Apple T2 security chip (a built-in ARM chip in newer Mac models) communicates with your system with a modified HTTP/2 protocol. There is also a command-line interface for various functions of the chip. ```text $ /usr/libexec/remotectl usage: remotectl list usage: remotectl show (name|uuid) usage: remotectl get-property (name|uuid) [service] property usage: remotectl dumpstate usage: remotectl browse usage: remotectl echo [-v service_version] [-d (name|uuid)] usage: remotectl echo-file (name|uuid) path usage: remotectl eos-echo usage: remotectl netcat (name|uuid) service usage: remotectl relay (name|uuid) service usage: remotectl loopback (attach|connect|detach|suspend|resume) usage: remotectl bonjour ((enable|enable-loopback interface_name)|(disable)) usage: remotectl convert-bridge-version plist-in-path bin-out-path usage: remotectl heartbeat (name|uuid) usage: remotectl trampoline [-2 fd] service_name command args ... [ -- [-2 fd] service_name command args ... ] ``` Example of the `list` command: ```text $ /usr/libexec/remotectl list MY_UUID_HERE localbridge iBridge2,3 J680AP 4.0 (17P572/17.16.10572.0.0,0) - ``` Example of the `show` command: ```text $ /usr/libexec/remotectl show MY_UUID_HERE Found localbridge (bridge) State: connected (connectable) UUID: MY_UUID_HERE Product Type: iBridge2,3 OS Build: 4.0 (17P572) Messaging Protocol Version: 1 Heartbeat: Last successful heartbeat sent 18.730s ago, received 18.727s ago (took 0.002s) 6147 heartbeats sent, 0 received Properties: { AppleInternal => false ChipID => 32786 EffectiveProductionStatusSEP => true HWModel => J680AP HasSEP => true LocationID => 2148532224 RegionInfo => LL/A EffectiveSecurityModeAp => true FDRSealingStatus => true SigningFuse => true BuildVersion => 17P572 OSVersion => 4.0 BridgeVersion => 17.16.10572.0.0,0 SensitivePropertiesVisible => true ProductType => iBridge2,3 BoardRevision => 1 Image4CryptoHashMethod => sha2-384 SerialNumber => MY_SERIAL_NUMBER_HERE BootSessionUUID => MY_BOOT_UUID_HERE BoardId => 11 DeviceColor => black EffectiveProductionStatusAp => true EffectiveSecurityModeSEP => true UniqueChipID => MY_UNIQUE_CHIP_ID UniqueDeviceID => MY_UNIQUE_DEVICE_ID RemoteXPCVersionFlags => 72057594037927942 CertificateSecurityMode => true CertificateProductionStatus => true DeviceEnclosureColor => black ModelNumber => Z0V16LL/A RegionCode => LL SecurityDomain => 1 InterfaceIndex => 4 HardwarePlatform => t8012 Image4Supported => true } Services: com.apple.powerchime.remote com.apple.mobile.storage_mounter_proxy.bridge com.apple.lskdd com.apple.eos.BiometricKit com.apple.aveservice com.apple.icloud.findmydeviced.bridge com.apple.private.avvc.xpc.remote com.apple.nfcd.relay.control com.apple.corespeech.xpc.remote.control com.apple.mobileactivationd.bridge com.apple.sysdiagnose.stackshot.remote com.apple.multiverse.remote.bridgetime com.apple.eos.LASecureIO com.apple.xpc.remote.multiboot com.apple.nfcd.relay.uart com.apple.xpc.remote.mobile_obliteration com.apple.corespeech.xpc.remote.record com.apple.sysdiagnose.remote com.apple.mobile.storage_mounter_proxy.bridge.macOS com.apple.bridgeOSUpdated com.apple.osanalytics.logTransfer com.apple.internal.xpc.remote.kext_audit com.apple.recoverylogd.bridge com.apple.corecaptured.remoteservice com.apple.logd.remote-daemon com.apple.videoprocessingd.encode.remote ``` ### brctl This is a utility related to "CloudDocs", also know as iCloud Drive. ```text $ brctl Usage: brctl [command-options and arguments] -h,--help show this help COMMANDS diagnose [options] [--doc|-d ] [] diagnose and collect logs -M,--collect-mobile-documents[=] (default: all containers) -s,--sysdiagnose Do not collect what's already part of sysdiagnose -t,--uitest Collect logs for UI tests -n,--name= Change the device name -f,--full Do a full diagnose, including server checks -d,--doc= Collect additional information about the document at that path. Helps when investigating an issue impacting a specific document. -e,--no-reveal Do not reveal diagnose in the Finder when done [] Specifies the output path of the diagnosis; -n becomes useless. log [options] [] -a,--all Show all system logs -p,--predicate Additional predicate (see `log help predicates`) -x,--process Filter events from the specified process -d,--path= Use instead of default -S,--start="YYYY-MM-DD HH:MM:SS" Start log dump from a specified date -E,--end="YYYY-MM-DD HH:MM:SS" Stop log dump after a specified date -b Only show CloudDocs logs -f Only show FileProvider related logs -g Only show Genstore related logs -z,--local-timezone Display timestamps within local timezone dump [options] [] dump the CloudDocs database -o,--output= redirect output to -d,--database-path= Use the database at -i,--itemless Don't dump items from the db -u,--upgrade Upgrade the db if necessary before dumping [] the container to be dumped status [] Prints items which haven't been completely synced up / applied to disk [] the container to be dumped quota Displays the available quota in the account monitor [options] [ ...] monitor activity -g dump global activity of the iCloud Drive -i dump changes incrementally -S,--scope= restrict the NSMetadataQuery scope to docs, data, external or a combination [ ...] list of containers to monitor, ignored when -g is used ``` A pretty cool command here is a utility to get the quota left on your iCloud Drive: ```text $ brctl quota 2098962726220 bytes of quota remaining ``` ### sysadminctl Basically an all around useful tool for managing users, as well as manage full-disk encryption (FileVault). ```text $ /usr/sbin/sysadminctl Usage: sysadminctl -deleteUser [-secure || -keepHome] (interactive || -adminUser -adminPassword ) -newPassword -oldPassword [-passwordHint ] -resetPasswordFor -newPassword [-passwordHint ] (interactive] || -adminUser -adminPassword ) -addUser [-fullName ] [-UID ] [-shell ] [-password ] [-hint ] [-home ] [-admin] [-picture ] (interactive] || -adminUser -adminPassword ) -secureTokenStatus -secureTokenOn -password (interactive || -adminUser -adminPassword ) -secureTokenOff -password (interactive || -adminUser -adminPassword ) -guestAccount -afpGuestAccess -smbGuestAccess -automaticTime -filesystem status -screenLock -password Pass '-' instead of password in commands above to request prompt. '-adminPassword' used mostly for scripted operation. Use '-' or 'interactive' to get the authentication string interactively. This preferred for security reasons ``` A pretty useful command in this tool is to check if FileVault is enabled: ```text $ sudo sysadminctl -filesystem status 2019-10-13 10:16:41.266 sysadminctl[61797:3404423] Boot volume CS FDE: NO 2019-10-13 10:16:41.298 sysadminctl[61797:3404423] Boot volume APFS FDE: YES ``` ### ckksctl CloudKit controls, probably useful for some advanced users. ```text $ /usr/sbin/ckksctl usage: ckksctl [-p] [-j] [-v arg] [status] [fetch] [push] [resync] [reset] [reset-cloudkit] [ckmetric] Control and report on CKKS positional arguments: optional arguments: -p, --perfcounters Print CKKS performance counters -j, --json Output in JSON format -v arg, --view arg Operate on a single view optional commands: status Report status on CKKS views fetch Fetch all new changes in CloudKit and attempt to process them push Push all pending local changes to CloudKit resync Resync all data with what's in CloudKit reset All local data will be wiped, and data refetched from CloudKit reset-cloudkit All data in CloudKit will be removed and replaced with what's local ckmetric Push CloudKit metric ``` ### otctl This is the Octagon Trust utility. It's a pretty neat view of the underlying trust network being used by your Apple Devices. ```text $ /usr/sbin/otctl usage: otctl [-s arg] [-e arg] [-r arg] [-j] [--altDSID arg] [--entropy arg] [--container arg] [--radar arg] [start] [sign-in] [sign-out] [status] [resetoctagon] [allBottles] [recover] [depart] [er-trigger] [er-status] [er-reset] [er-store] [health] [taptoradar] Control and report on Octagon Trust positional arguments: optional arguments: -s arg, --secret arg escrow secret -e arg, --bottleID arg bottle record id -r arg, --skipRateLimiting arg enter values YES or NO, option defaults to NO, This gives you the opportunity to skip the rate limiting check when performing the cuttlefish health check -j, --json Output in JSON --altDSID arg altDSID (for sign-in/out) --entropy arg escrowed entropy in JSON --container arg CloudKit container name --radar arg Radar number optional commands: start Start Octagon state machine sign-in Inform Cuttlefish container of sign in sign-out Inform Cuttlefish container of sign out status Report Octagon status resetoctagon Reset and establish new Octagon trust allBottles Fetch all viable bottles recover Recover using this bottle depart Depart from Octagon Trust er-trigger Trigger an Escrow Request request er-status Report status on any pending Escrow Request requests er-reset Delete all Escrow Request requests er-store Store any pending Escrow Request prerecords health Check Octagon Health status taptoradar Trigger a TapToRadar ``` Run the following command to list your peers: ```text $ /usr/sbin/otctl status ... Lots of Useful Output ... ``` ### spctl This is the System Policy management utility. You can enable and disable Gatekeeper and other code-signing features this way. ```text $ /usr/sbin/spctl System Policy Basic Usage: spctl --assess [--type type] [-v] path ... # assessment spctl --add [--type type] [--path|--requirement|--anchor|--hash] spec ... # add rule(s) spctl [--enable|--disable|--remove] [--type type] [--path|--requirement|--anchor|--hash|--rule] spec # change rule(s) spctl --status | --master-enable | --master-disable # system master switch Developer Mode Usage: spctl developer-mode enable-terminal Add Terminal as a developer tool. Kernel Extension User Consent Usage: spctl kext-consent ** Modifications only available in Recovery OS ** status Print whether kernel extension user consent is enabled or disabled. enable Enable requiring user consent for kernel extensions. disable Disable requiring user consent for kernel extensions. add Insert a new Team Identifier into the list allowed to load kernel extensions without user consent. list Print the list of Team Identifiers allowed to load without user consent. remove Remove a Team Identifier from the list allowed to load kernel extensions without user consent. ``` A useful command is to view the status of the system policy assesments: ```text $ /usr/sbin/spctl --status assessments enabled ``` ### networksetup Network setup is pretty much everything network-related minus some wireless stuff. ```text $ /usr/sbin/networksetup networksetup Help Information ------------------------------- Usage: networksetup -listnetworkserviceorder Display services with corresponding port and device in order they are tried for connecting to a network. An asterisk (*) denotes that a service is disabled. Usage: networksetup -listallnetworkservices Display list of services. An asterisk (*) denotes that a network service is disabled. Usage: networksetup -listallhardwareports Display list of hardware ports with corresponding device name and ethernet address. Usage: networksetup -detectnewhardware Detect new network hardware and create a default network service on the hardware. Usage: networksetup -getmacaddress Display ethernet (or Wi-Fi) address for hardwareport or device specified. Usage: networksetup -getcomputername Display the computer name. Usage: networksetup -setcomputername Set the computer's name (if valid) to . Usage: networksetup -getinfo Display IPv4 address, IPv6 address, subnet mask, router address, ethernet address for . Usage: networksetup -setmanual Set the TCP/IP configuration to manual with IP address set to ip, Subnet Mask set to subnet, and Router address set to router. Usage: networksetup -setdhcp [clientid] Set the TCP/IP configuration to DHCP. You can set the DHCP client id to the optional [clientid]. Specify "Empty" for [clientid] to clear the DHCP client id. Usage: networksetup -setbootp Set the TCP/IP configuration to BOOTP. Usage: networksetup -setmanualwithdhcprouter Set the TCP/IP configuration to manual with DHCP router with IP address set to ip. Usage: networksetup -getadditionalroutes Get additional IPv4 routes associated with Usage: networksetup -setadditionalroutes [ ]* Set additional IPv4 routes associated with by specifying one or more [ ] tuples. Remove additional routes by specifying no arguments. If is "", the route is direct to the interface Usage: networksetup -setv4off Turn IPv4 off on . Usage: networksetup -setv6off Turn IPv6 off on . Usage: networksetup -setv6automatic Set the service to get its IPv6 info automatically. Usage: networksetup -setv6LinkLocal Set the service to use its IPv6 only for link local. Usage: networksetup -setv6manual

Set the service to get its IPv6 info manually. Specify

and . Usage: networksetup -getv6additionalroutes Get additional IPv6 routes associated with Usage: networksetup -setv6additionalroutes [ ]* Set additional IPv6 routes associated with by specifying one or more [ ] tuples. Remove additional routes by specifying no arguments. If is "", the route is direct to the interface Usage: networksetup -getdnsservers Display DNS info for . Usage: networksetup -setdnsservers [dns2] [...] Set the DNS servers to [dns2] [...]. Any number of dns servers can be specified. Specify "Empty" for to clear all DNS entries. Usage: networksetup -getsearchdomains Display Domain Name info for . Usage: networksetup -setsearchdomains [domain2] [...] Set the Domain Name servers to [domain2] [...]. Any number of Domain Name servers can be specified. Specify "Empty" for to clear all Domain Name entries. Usage: networksetup -create6to4service Create a 6 to 4 service with name . Usage: networksetup -set6to4automatic Set the service to get its 6 to 4 info automatically. Usage: networksetup -set6to4manual Set the service to get its 6 to 4 info manually. Specify for the relay address. Usage: networksetup -getftpproxy Display FTP proxy (server, port, enabled value) info for . Usage: networksetup -setftpproxy Set FTP proxy for with and . Turns proxy on. Optionally, specify or for to enable and disable authenticated proxy support. Specify and if you turn authenticated proxy support on. Usage: networksetup -setftpproxystate Set FTP proxy to either or . Usage: networksetup -getwebproxy Display Web proxy (server, port, enabled value) info for . Usage: networksetup -setwebproxy Set Web proxy for with and . Turns proxy on. Optionally, specify or for to enable and disable authenticated proxy support. Specify and if you turn authenticated proxy support on. Usage: networksetup -setwebproxystate Set Web proxy to either or . Usage: networksetup -getsecurewebproxy Display Secure Web proxy (server, port, enabled value) info for . Usage: networksetup -setsecurewebproxy Set Secure Web proxy for with and . Turns proxy on. Optionally, specify or for to enable and disable authenticated proxy support. Specify and if you turn authenticated proxy support on. Usage: networksetup -setsecurewebproxystate Set SecureWeb proxy to either or . Usage: networksetup -getstreamingproxy Display Streaming proxy (server, port, enabled value) info for . Usage: networksetup -setstreamingproxy Set Streaming proxy for with and . Turns proxy on. Optionally, specify or for to enable and disable authenticated proxy support. Specify and if you turn authenticated proxy support on. Usage: networksetup -setstreamingproxystate Set Streaming proxy to either or . Usage: networksetup -getgopherproxy Display Gopher proxy (server, port, enabled value) info for . Usage: networksetup -setgopherproxy Set Gopher proxy for with and . Turns proxy on. Optionally, specify or for to enable and disable authenticated proxy support. Specify and if you turn authenticated proxy support on. Usage: networksetup -setgopherproxystate Set Gopher proxy to either or . Usage: networksetup -getsocksfirewallproxy Display SOCKS Firewall proxy (server, port, enabled value) info for . Usage: networksetup -setsocksfirewallproxy Set SOCKS Firewall proxy for with and . Turns proxy on. Optionally, specify or for to enable and disable authenticated proxy support. Specify and if you turn authenticated proxy support on. Usage: networksetup -setsocksfirewallproxystate Set SOCKS Firewall proxy to either or . Usage: networksetup -getproxybypassdomains Display Bypass Domain Names for . Usage: networksetup -setproxybypassdomains [domain2] [...] Set the Bypass Domain Name Servers for to [domain2] [...]. Any number of Domain Name servers can be specified. Specify "Empty" for to clear all Domain Name entries. Usage: networksetup -getproxyautodiscovery Display whether Proxy Auto Discover is on or off for . Usage: networksetup -setproxyautodiscovery Set Proxy Auto Discovery to either or . Usage: networksetup -getpassiveftp Display whether Passive FTP is on or off for . Usage: networksetup -setpassiveftp Set Passive FTP to either or . Usage: networksetup -setautoproxyurl Set proxy auto-config to url for and enable it. Usage: networksetup -getautoproxyurl Display proxy auto-config (url, enabled) info for . Usage: networksetup -setautoproxystate Set proxy auto-config to either or . Usage: networksetup -getairportnetwork Display current Wi-Fi Network for . Usage: networksetup -setairportnetwork [password] Set Wi-Fi Network to for . If a password is included, it gets stored in the keychain. Usage: networksetup -getairportpower Display whether Wi-Fi power is on or off for . Usage: networksetup -setairportpower Set Wi-Fi power for to either or . Usage: networksetup -listpreferredwirelessnetworks List the preferred wireless networks for . Usage: networksetup -addpreferredwirelessnetworkatindex [password] Add wireless network named to preferred list for at . For security type, use OPEN for none, WPA for WPA Personal, WPAE for WPA Enterprise, WPA2 for WPA2 Personal, WPA2E for WPA2 Enterprise, WEP for plain WEP, and 8021XWEP for 802.1X WEP. If a password is included, it gets stored in the keychain. Usage: networksetup -removepreferredwirelessnetwork Remove from the preferred wireless network list for . Usage: networksetup -removeallpreferredwirelessnetworks Remove all networks from the preferred wireless network list for . Usage: networksetup -getnetworkserviceenabled Display whether a service is on or off (enabled or disabled). Usage: networksetup -setnetworkserviceenabled Set to either or (enabled or disabled). Usage: networksetup -createnetworkservice Create a service named on port . The new service will be enabled by default. Usage: networksetup -renamenetworkservice Rename to . Usage: networksetup -duplicatenetworkservice Duplicate and name it with . Usage: networksetup -removenetworkservice Remove the service named . Will fail if this is the only service on the hardware port that is on. Usage: networksetup -ordernetworkservices <...> Order the services in order specified. Use "-listnetworkserviceorder" to view service order. Note: use quotes around service names which contain spaces (ie. "Built-in Ethernet"). Usage: networksetup -setMTUAndMediaAutomatically Set hardwareport or device specified back to automatically setting the MTU and Media. Usage: networksetup -getMTU Get the MTU value for hardwareport or device specified. Usage: networksetup -setMTU Set MTU for hardwareport or device specified. Usage: networksetup -listvalidMTUrange List the valid MTU range for hardwareport or device specified. Usage: networksetup -getmedia Show both the current setting for media and the active media on hardwareport or device specified. Usage: networksetup -setmedia [option1] [option2] [...] Set media for hardwareport or device specified to subtype. Specify optional [option1] and additional options depending on subtype. Any number of valid options can be specified. Usage: networksetup -listvalidmedia List valid media options for hardwareport or device name. Enumerates available subtypes and options per subtype. Usage: networksetup -createVLAN Create a VLAN with name over device with unique tag . A default network service will be created over the VLAN. Usage: networksetup -deleteVLAN Delete the VLAN with name over the parent device with unique tag . If there are network services running over the VLAN they will be deleted. Usage: networksetup -listVLANs List the VLANs that have been created. Usage: networksetup -listdevicesthatsupportVLAN List the devices that support VLANs. Usage: networksetup -isBondSupported Return YES if the specified device can be added to a bond. NO if it cannot. Usage: networksetup -createBond <...> Create a new bond and give it the user defined name. Add the specified devices, if any, to the bond. Usage: networksetup -deleteBond Delete the bond with the specified device-name. Usage: networksetup -addDeviceToBond Add the specified device to the specified bond. Usage: networksetup -removeDeviceFromBond Remove the specified device from the specified bond Usage: networksetup -listBonds List all of the bonds. Usage: networksetup -showBondStatus Display the status of the specified bond. Usage: networksetup -listpppoeservices List all of the PPPoE services in the current set. Usage: networksetup -showpppoestatus Display the status of the specified PPPoE service. Usage: networksetup -createpppoeservice [pppoe service name] Create a PPPoE service on the specified device with the service name specified. The "pppoe service name" is optional and may not be supported by the service provider. Usage: networksetup -deletepppoeservice Delete the PPPoE service. Usage: networksetup -setpppoeaccountname