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1816
votes
7answers
1.2m views

Why am I getting an “invalid active developer path” when attempting to use Git after upgrading to macOS Catalina?

After upgrading to macOS Catalina, I tried to run git from Terminal but it kept giving me the following error: xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), ...
584
votes
155answers
331k views

Please share your hidden macOS features or tips and tricks

Do you know any hidden or little-known nice feature of macOS (née Mac OS X)? It doesn't matter what it is—maybe just a short terminal command or a keyboard shortcut. Share your experiences on ...
571
votes
8answers
516k views

List of all packages installed using Homebrew

Is it possible to and how do I get a list of all the packages installed on my Mac using Homebrew? I am not interested in packages installed outside of Homebrew.
563
votes
5answers
464k views

How can I permanently add my SSH private key to Keychain so it is automatically available to ssh?

It seems that ssh-add -K ~/.ssh/id_rsa will load your key but will ask for the password each time you reboot. I am looking for a solution that would not require me to re-enter the key password ...
404
votes
133answers
240k views

Got any tips or tricks for Terminal in Mac OS X?

One tip or trick per answer. My favorite is open . Opens the folder you're currently browsing in Finder. You can also pass URLs, images, documents or else to open. If you specify a program name ...
395
votes
14answers
208k views

git auto-complete for *branches* at the command line?

On my Linux machine I have autocomplete for branches with Git. [Note we are talking about git branch completion, not bash completion (e.g. commands, files, etc). Thus NOT Lane's answer at all] For ...
391
votes
9answers
291k views

How to find cause of high kernel_task cpu usage?

Occasionally my machine will have a kernel_task instance max out the CPU: This can last from minutes to sometimes hours. The machine is effectively unusable in this state. Restarting doesn't help; a ...
391
votes
12answers
136k views

Remap “Home” and “End” to beginning and end of line

Most of my computing time is spent in Linux (with occasional time in Windows). On these platforms the Home and End keys universally jump to the beginning or end of the current line. I am gradually ...
376
votes
6answers
528k views

How can I create a symbolic link in Terminal?

What command is used to create a symbolic link/soft link?
376
votes
2answers
167k views

What is the difference between `brew` and `brew cask`?

So, what is the difference between brew and brew cask? I know that homebrew is a package management software. But what kind of software can I get there? Is it open source software and commercial ...
372
votes
7answers
167k views

How do I disable Chrome's two-finger back/forward navigation?

In dev builds of Chrome, they've implemented, refined, and released two-finger swipes left/right in order to browse back/forward in the browser history. Unfortunately, you can accidentally trigger it ...
370
votes
7answers
267k views

How do I recompile Bash to avoid Shellshock (the remote exploit CVE-2014-6271 and CVE-2014-7169)?

Given that Bash 3.2 (the version shipped by OS X) is vulnerable to the remote execution exploit known as "Shell Shock" (CVE-2014-6271 and CVE-2014-7169) how do I rebuild Bash and secure my system ...
360
votes
11answers
358k views

Shortcut for toggling between different windows of same app?

I opened two Google Chrome windows (because I am using multiple Gmails) and when I do the Cmd ⌘ Tab ⇥ shortcut it just shows me other applications that I opened but does not show me the other Chrome ...
358
votes
11answers
280k views

How can I configure Mac Terminal to have color ls output?

How can I configure Mac Terminal to have color ls output? I am using MacOS 10.5
351
votes
38answers
207k views

What Window Management Options exist for OS X?

I'd like to do something with my windows on OS X, where something includes options like re-arranging, moving, re-sizing, remembering positions, cloning across Spaces, etc. What options exist? Rules ...
332
votes
12answers
188k views

How can I trigger a Notification Center notification from an AppleScript or shell script?

I'd love to be able to take advantage of 10.8's Notification Center features in AppleScripts and shell scripts I write. Is there a built-in command or a third-party library I can use from either an ...
330
votes
7answers
316k views

Why does my dock keep moving back to my other monitor?

I have a larger, external monitor connected to my MacBook Pro and have arranged it such that the dock is in the external monitor (via System Preferences > Displays > Arrangement, by dragging the white ...
308
votes
5answers
106k views

How can I disable animation when switching desktops in Lion?

I would very much like to disable the sliding animation that occurs when switching desktops via ctrl+→/← or ctrl+[number] in Lion. This was previously accomplished in previous versions ...
304
votes
11answers
164k views

How to separate “mouse” and “trackpad” settings?

In System Preferences > Mouse there's a setting "Scroll direction: natural", which I don't like, so I unset. The problem is that this also unsets the setting for Trackpad, which I do like. How can ...
303
votes
5answers
241k views

What is the difference between .bash_profile and .bashrc?

To make an alias for the Terminal in OS X, you can either put the aliases in .bash_profile or .bashrc. What is the difference between the two and why would I choose to put aliases in one and not the ...
293
votes
4answers
387k views

How do I stop the Adobe Creative Cloud app from auto-launching on login?

How do I stop the Adobe Creative Cloud app from auto-launching on login? I don't see any option of stopping this, and for some reason it's not in OS X's user login options.
279
votes
7answers
129k views

“File Open” dialog is missing sidebar items

I'm having the strangest issue since updating to OS X El Capitan. My "Open File" dialogs show the sidebar but all my main (and useful) locations are missing. Take a look at this screenshot. This ...
275
votes
3answers
180k views

Hotkey to show hidden files and folders in File Open dialog?

This question is very similar to Is it possible to always show hidden/dotfiles in Open/Save dialogs?. How to show hidden files and folders in finder? is also related. However, I don't want to always ...
274
votes
3answers
1.5m views

How to Retrieve the Wi-Fi Password of a Connected Network on a Mac

I need to find the password for a Wi-Fi network that I am already connected to. I'm using a MacBook Pro that's running OS X Lion. Any guidance is appreciated.
267
votes
1answer
83k views

How to prevent Mac from changing the order of Desktops/Spaces

You may have encountered a situation in which Mac changes the order of desktops based on some events like alerts on a program or a web page in browser. How could I disable this logical change? Note: I'...
265
votes
8answers
574k views

How to change computer name so terminal displays it in Mac OS X Mountain Lion? [duplicate]

When I setup my computer I named it "Scott's MacBook Pro". And so when I go to System preferences->Sharing, it says Scott's MacBook Pro there as my computer name. However, opening up a terminal gives ...
262
votes
7answers
78k views

Using Alt/Cmd + Right/Left Arrow in iTerm

Is it possible to move between words in iTerm using Alt + Right/Left Arrows ? Now if I press Alt+Left I will get '[D' and '[C' if I press Alt+Right.
261
votes
12answers
399k views

How do I downgrade node or install a specific previous version using homebrew?

I'm using brew. I have node installed, using brew. I want to use an earlier version of node. Online, I find instructions such as, for example: cd /usr/local/Library/Formula brew remove node --force ...
251
votes
3answers
167k views

What is the “rootless” feature in El Capitan, really?

I have just learned about the "Rootless" feature in El Capitan, and I am hearing things like "There is no root user", "Nothing can modify /System" and "The world will end because we can't get root". ...
247
votes
4answers
686k views

How can I list my open network ports with netstat?

I would like to list my open network ports in Terminal with built in commands. As what I know, netstat is the command to use. But I'm struggling to get any useful information out of it. How can I ...
246
votes
8answers
712k views

How can I manually delete old backups to free space for Time Machine?

I use a Time Capsule for backup and now I want the drive to back up data from an extra Mac. But the drive is filled up with old backups from Mac 1. There simply is not enough space available for the ...
245
votes
16answers
604k views

How to combine two images into one on a Mac?

Say I have two photos (or any images), for example with the following dimensions: +----------+ +----------+ | | | | | | | | |320 x 428 | and |...
245
votes
7answers
134k views

Make the green full screen window icon on Yosemite maximize windows

On Mac OS X Yosemite the green icon in every window: is by default used to make the application full screen. How do I make it work the same way as in previous versions of Mac OS X, i.e. to maximize ...
236
votes
9answers
100k views

iTerm - going one word backwards and forwards

Would it be possible to configure iTerm 2 to go backwards and forwards one word through the curent text in the command line using a keyboard shortcut?
236
votes
13answers
315k views

mds and mds_stores constantly consuming cpu

mds and mds_stores are constant CPU consumers even when I think nothing should have changed on the hard drive. Activity Monitor: I have a circa 2009 Macbook Pro with lots of software installed over ...
228
votes
14answers
418k views

Why doesn't .bashrc run automatically?

I put some alias commands in my .bashrc file, so that they might be loaded everytime I open a new Terminal window. Yet this doesn't happen. I have to select run script: in the Terminal>Preferences&...
215
votes
6answers
97k views

Applications Don't Show Up in Spotlight

Spotlight has stopped showing any results for my Applications. I've tried reindexing and removing the index so it rebuilds it. No change. I've tried adding Applications to the Privacy tab and removing ...
214
votes
15answers
210k views

What do I type to produce the command symbol (⌘) in Mac OS X?

What combination of keys do I press to produce the command symbol (⌘) on Mac OS X? (I copied the above symbol from http://en.wikipedia.org/wiki/Command_key.)
213
votes
8answers
614k views

How do I find my IP Address from the command line?

I know you can do ifconfig | grep inet, but that shows you several IPv4 addresses. How do I get the specific one for SSHing et al?
213
votes
8answers
92k views

I included emoji in my password and now I can't log in to my Account on Yosemite

I wanted to check if it's possible to use emoji in a password for my Account on OS Yosemite. It worked but I didn't realize that the login screen has only native keyboards, so I can't type emoji there....
210
votes
6answers
146k views

How to replace Mac OS X utilities with GNU core utilities?

I found there is some differences between the utility command I used on the mac OSX and linux. I want to make my experience united. How could I replace all my mac utilities with GNU utilities?
208
votes
21answers
262k views

Is there a Mac OS X Terminal version of the “free” command in Linux systems?

On Linux, I often use the free command to see the current amount of free and used memory in the system. For example: $ free total used free shared buffers cached ...
205
votes
10answers
139k views

macOS Sierra doesn’t seem to remember SSH keys between reboots

I have to run this command since upgrading to macOS: ssh-add -K Corrects the problem after the reboot but I have to run this command every time I log on to my computer. If I do not run the command ...
203
votes
7answers
1.3m views

How do I combine two or more images to get a single pdf file?

Say I have some image files (for instance, the result of scanning some sheets) and I want to combine them into a single pdf file, each image on a different page. Is there a faster / more convenient ...
198
votes
10answers
115k views

How do I remove the Google Chrome notifications bell icon from the Mac OS X menu bar?

This bell icon showed up in my menu bar one day and there's no obvious way to disable it. How do I get rid of it?
196
votes
1answer
248k views

How do I launch Finder from terminal or command line [duplicate]

I use command line a lot, like most programmers. I want to be able to launch Finder, Safari or any other application for that matter from command line e.g. finder . where it will start Finder ...
195
votes
9answers
316k views

Can I get the CPU temperature and fan speed from the command line in OS X?

Is there a command I can run from the command line in OS X to get the current CPU temperature and/or the fan speed(s)? To be more specific, I'd like to be able to get the same info available in the ...
194
votes
5answers
361k views

Can I open files in TextEdit from the Terminal in Mac OS X?

I frequently find that a Terminal command to open a file in TextEdit would be very handy. Does such a command exist on Mac OS X?
185
votes
4answers
66k views

What are the practical differences between Bash and Zsh?

With the news that Catalina will default to Zsh instead of Bash, I'm finding lots of results telling me about the switch, and that it may cause problems with shell scripts, but I'm not familiar enough ...
184
votes
4answers
105k views

How to increase keyboard key repeat rate on OS X?

I know how to set the key repeat rate using System Preferences > Keyboard but it looks that the fastest settings is not enough. Is there any way to speed up even more? I do not know if others ...

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