Skip to main content

These Terminal commands will take your MacOS skills to the next level

MacOS Terminal Commands
Bill Roberson/Digital Trends
The MacOS Terminal can be pretty intimidating. It’s the kind of tool that can make anyone feel out of their depth. It lurks there in your Utilities folder beside all those other applications you only ever need to launch when there’s something seriously wrong with your Mac.

This application is a powerful tool that allows you to access the deepest recesses of your Mac and fiddle around with things that you may have thought were off limits. It’s frequently used by system admins and software developers, but it’s easy enough for the average person to use as well.

Let’s take a guided tour through the four most useful MacOS terminal commands, and how you can use them to tailor your MacOS High Sierra experience.

How to open the terminal

Image used with permission by copyright holder

This is probably the most important part of this guide since many people don’t know that the Terminal even exists. To open the Terminal, all you need to do is open your Finder, click on Applications there on the left sidebar, and then open the Utilities folder all the way at the bottom. The Terminal icon looks like a little black window, ready to take your commands. The icon is fitting because that’s exactly what the application does.

Terminal is an interface through which you do nothing more than issue text commands to your Mac. Once you issue a command, the Terminal will respond in one of three ways: recognize and accept those commands, not recognize them, or prompt you for further input. It’s that simple.

The commands below will help familiarize you with how the Terminal works, and what you can use it for in your everyday life.

Keep your Mac from sleeping

Full command: caffeinate -u -t 600  Image used with permission by copyright holder

This command accomplishes one very simple problem: keeping your computer awake for a period of time. Just open the Terminal and type in ‘caffeinate’ and your Mac or MacBook won’t go to sleep until you terminate that Terminal window. You can also set a timer, by typing ‘caffeinate -u -t’ then how long, in seconds, you want to prevent your Mac from sleeping.

The completed command would look something like this: ‘caffeine -u -t 120’ — and that’ll keep your Mac from sleeping for just two minutes.

Change screenshot formats

Full command: defaults write type JPG Image used with permission by copyright holder

MacOS makes it really easy to capture screenshots of your whole screen (Command + Shift 3) or just part of your screen (Command + Shift +4). However, it always saves those screenshots to your desktop as PNG files. That’s not always a bad thing, but sometimes you just need a JPG. If you’re not sure why that matters, check out our breakdown of image filetypes for the full explanation.

This Terminal command can solve that problem. It allows you to change the filetype your screenshots will be saved as — in this example, we’ve used JPG which will make all your screenshots save as JPG files. You can change it back at any time by typing the above command but instead of JPG, type PNG.

Show detailed file paths

Full command: defaults write _FXShowPosixPathInTitle -bool YES Image used with permission by copyright holder

By default, when you open a folder in MacOS, the top of the window will show the name of the folder, but not where it is. For instance, open up your Pictures folder and the top of the finder window will just say Pictures, not ‘users/yourname/pictures.’ It’s not a problem, but it can be irritating, especially when you’re moving folders around or digging through folders trying to find a particular file.

This terminal command shows the full path of a folder in the Finder window of that folder. If nothing else it’s a helpful way to get an idea of how your files are arranged and keep your Mac nice and organized. Undoing this change is just as easy as typing out the above command again, and replacing YES with NO.

Show hidden files

Full command: defaults write AppleShowAllFiles TRUE Image used with permission by copyright holder

Sometimes you just need to dig into the sensitive guts of MacOS to fix some problem or another, and that will require accessing files that your Mac would prefer you left alone. By default, most sensitive files and folders are hidden from view, including from Spotlight and Siri searches. With the right terminal command, you can peel back the curtain and peer into the darkest reaches of your Mac.

The above command un-hides all of your delicate system files. If you’d prefer those go back to being hidden, just re-enter the above command but swap TRUE with FALSE.

Editors' Recommendations

Jayce Wagner
Former Digital Trends Contributor
A staff writer for the Computing section, Jayce covers a little bit of everything -- hardware, gaming, and occasionally VR.
This tiny ThinkPad can’t quite keep up with the MacBook Air M2
Lenovo ThinkPad X1 Nano Gen 3 rear view showing lid and logo.

While the laptop industry continues to move toward 14-inch laptops and larger, the 13-inch laptop remains an important category. One of the best is the Apple MacBook Air M2, with an extremely thin and well-built chassis, great performance, and incredibly long battery life.

Lenovo has recently introduced the third generation of its ThinkPad X1 Nano, one of the lightest laptops we've tested and a good performer as well. It's stiff competition, but which of these two diminutive laptops stands apart?
Specs and configurations

Read more
How to take a screenshot on your Mac: the best methods in 2023
The keyboard and trackpad of the MacBook Pro 14-inch.

If you're new to the Mac, the first question people have is how to take a screenshot. There's no Print Screen key, so you'll be forgiven if it's not immediately obvious. Or hey, maybe you just forgot the keyboard shortcut or want to go deep into the very best screenshot apps available. We got ya.

There are plenty of options and customizations, so there's plenty to dig into. Here’s everything you could ever want to know about taking a screenshot on your Mac.
How to take a screenshot using keyboard shortcuts
MacOS keyboard shortcuts are the quickest ways to take screenshots, whether you're capturing the entire screen or just a portion. By default, Apple's methods save your screenshot to the desktop, but if you want to copy the screenshot to the clipboard, there's a keyboard shortcut you can use instead.
How to capture a selected area

Read more
This Windows laptop costs under $1,000 and handily beats the MacBook Air
Asus Zenbook 14 OLED rear view showing lid and logo.

The least expensive MacBook you can buy remains the MacBook Air M1, which Apple is keeping around in spite of a complete redesign with the MacBook Air M2. And there's good reason. The MacBook Air M1 is among the best laptops that sell for under $1,000.

But it's not the only great laptop for under $1,000. The Asus ZenBook 14 OLED is also a special machine, offering considerable value at a starting price of $700, including a luscious OLED display. As good as the MacBook Air is, the ZenBook 14 just might have it beat.

Read more