The command line interface is an alternate method of interacting with macOS and Mac OS X, relying on text based command entry to execute commands and perform tasks. It is accessed on the Mac by using the Terminal application. Generally, the command line is considered advanced, and thus it’s usage tends to be more complex than many standard procedures on a Mac.
Advanced Mac users may have noticed that X11 is no longer bundled with OS X, and it’s also no longer available as a separate installation option through Developer Tools. Instead, to run X11 on OS X Mountain Lion (and later), you’ll want to download and install the free XQuartz system, which bundles all the necessary … Read More
Though most Mac users will likely prefer to use Preview to batch resize images because of the ease of use, advanced users often like to go with the command line for repetitive tasks. We’ve discussed sips before as a way to resize, rotate, and flip images, but if sips is combined with wildcards it can … Read More
The quickest way to add a file extension to a group of files that don’t currently have one is by using the command line in Mac OS X. In the example below, we’ll add a “.txt” extension to all files in a single directory, but subbing .txt in the command string will add a different … Read More
To compare and list the different contents of two directories without the extra output you get through commands like diff, you can use the comm command instead. To get started, launch Terminal and type the following command, adjusting the directory paths as appropriate: comm -3 <(ls -1 folder1) <(ls -1 folder2) The output listed will … Read More
Time Machine backups can be triggered remotely thanks to SSH (Remote Login) and the command line. This is an excellent solution to use if you left the home or office without making an important backup, though the SSH requirement does add a potential layer of complexity that may make it more appropriate for advanced users. … Read More
If you’re a Mac owner you know that every time the Mac reboots or starts up it makes a startup chime sound. Though you can temporarily mute the chime by holding down the Mute key on any Mac keyboard, you can also choose to disable it completely by turning to the command line. To be … Read More
The history command is a useful way to find specific commands that have been used in the past, and it can also be used to discover what your personal most used commands are with the following command string: history | awk ‘{a[$2]++}END{for(i in a){print a[i] ” ” i}}’ | sort -rn | head -15 The … Read More
Searching the file system for a specific document or file is easy and very fast. Though most users are best served using Spotlight from the menubar, there are times when either Spotlight isn’t working, you need more paramaters, you’re working in the Terminal, operating with a remote machine, or perhaps just would like to use … Read More
You can set unique names for how your Macs computer name appears locally, from file sharing and networking, and even Bonjour services, with the help of the scutil command. This allows you to have a custom hostname for Terminal and SSH, another friendlier name for what’s visible to others on local networks, and yet another … Read More
For anyone who uses the command line regularly, a new tool called pkill makes killing processes significantly easier in modern releases of Mac OS and Mac OS X. Improving on the standard kill command, pkill easily supports wildcards, making it easy to terminate all processes belonging to a match or even a specific user.
Saving a complete listing of files contained with a folder is easy, and there are two quick ways to save that list as a text file. Save a List of Files from Finder The first approach may be easiest for most users and is done through the OS X Finder and TextEdit app, it’s a … Read More
Most Mac OS X preferences are managed through easily accessible control panels, but going behind the scenes with defaults write commands can lead to some genuinely useful tweaks that can only be made through the command line. This list represents a compilation of some of the best defaults write commands out there, and even if … Read More
Bored? Launch Terminal and get ready for some completely stupid tricks to keep yourself entertained. You’ll be listening to Horse Ebooks blab away, watching Star Wars in ASCII, playing retro games, toasting your CPU cores with a repetitive phrase, and even talking to a virtual psychotherapist. The hidden joys of the command line are upon … Read More
If you want to completely peg CPU to stress test a Mac, turn no further than the Terminal. Using the command line you can easily max out all CPU cores and induce huge load on a Mac, making it easy to determine things like what temperature the processor reaches under heavy load, if fans are … Read More
Using the command line softwareupdate tool you can update Mac OS X system software without using the App Store. This is particularly useful for Mac users running later versions of Mac OS X where the software update system is primarily handled through the Mac App Store, but can occasionally either go awry or be inaccessible … Read More
OS X Mavericks comes with PHP 5.4.30, and OS X Mountain Lion ships with PHP 5.3.13 preinstalled, though if you start the built-in Apache server, you will find PHP isn’t enabled by default. Changing this is easy, and if you’re a web developer and want PHP running on your local Mac with OS X 10.8 … Read More
Rebooting a Mac from the command line is fairly simple, though it should be pointed out that most Mac OS X users are best served just using the standard Apple menu method to issue a system restart. Nonetheless, for advanced Mac users, using the terminal reboot command can be an invaluable trick for troubleshooting … Read More
The Sharing preference panel options were changed a bit in OS X Mountain Lion and again in Mavericks, and while things like Internet Sharing remain, the Web Sharing preference panel was removed. The Apache web server remains bundled with Mac OS X though, but you’ll need to turn to the command line to enable the … Read More
