OS X (formerly Mac OS X) is the marketing name for Apple's computer OS. Note the proper pronunciation is "ohh ess ten" and not "oh ess ex".

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449
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136answers
295k views

Please share your hidden OS X features or tips and tricks

Do you know any hidden or little-known nice feature of Mac OS X? It doesn't matter what it is—maybe just a short terminal command or a keyboard shortcut. Share your experiences on hidden Mac OS ...
349
votes
7answers
260k 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 ...
227
votes
8answers
140k 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
194
votes
7answers
97k 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 ...
183
votes
4answers
57k 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 ...
164
votes
107answers
52k views

What tiny thing in Lion makes you smile or has caught you off guard?

I would like to call for a place to list some little things that surprise you about Lion. There are so many articles and lists of all the new features with information overload, I would rather focus ...
142
votes
4answers
67k views

How to fix brew after OSX upgrade to Yosemite?

I faced some issue with Homebrew. I upgraded to Yosemite. After the upgrade, homebrew seems to be broken. I would run any brew command and get this error /usr/local/bin/brew: ...
135
votes
23answers
35k views

Is there a quick way to lock my Mac?

On Windows you can hit the keys Windows+L to lock your computer if you step away. I don't want to have to remember if sleep currently asks for a password, if there is a time out where my screen isn't ...
135
votes
3answers
71k 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". ...
131
votes
2answers
867k 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.
127
votes
6answers
39k 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 ...
118
votes
8answers
257k 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 ...
109
votes
25answers
132k views

OS X Terminal “must have” utilities [closed]

I've just read with pleasure, and learned a lot from these questions : OS X Terminal Tips and Tricks OS X Hidden features and nice tips & tricks OS X Applications you can't live without But I ...
108
votes
7answers
356k 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 ...
103
votes
2answers
150k views

How can I create a symbolic link in Terminal?

What command is used to create a symbolic link/soft link?
101
votes
53answers
18k views

What features of Mavericks are beneficial to you?

This question serves to share and collect the enhancements that make a large difference to how you use your Mac. Please post one feature per answer. Please also check to see if your answer has ...
99
votes
8answers
59k views

How to simulate slow internet connections on the mac

What's a good software solution to slow down internet connections on the mac for testing and simulations? My primary need is when testing code in the iPhone / iOS simulator, so slowing down the ...
98
votes
9answers
69k views

WindowServer high CPU on Yosemite

This is a follow up to So my Yosemite install is slow - what to do? Since installing Yosemite a week or so ago my machine is very sluggish. I am a web developer so I change windows/apps a lot. ...
97
votes
13answers
37k views

Keyboard shortcut for restoring applications from the Mac OS X Dock?

Is there a keyboard shortcut to restore a minimised application window from the Dock? Almost all Apple Mac OSX applications respond to the Apple + M command which minimises the current application ...
96
votes
9answers
84k 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.)
96
votes
5answers
167k 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?
91
votes
10answers
194k views

How can I mount an ext4 file system on OS X?

Is there a safe, stable application for reading from and writing to ext4 file systems on Mac OS X? If not, what's the best way to access the contents of an ext4 file system on ...
88
votes
5answers
24k 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 ...
84
votes
53answers
14k views

What un(der)-documented features have you stumbled upon in Mountain Lion?

This question serves to share and collect the enhancements which are not documented by Apple, or documented poorly. Please justify your answer; if it is something that is well documented by Apple and ...
81
votes
13answers
81k views

Write in NTFS using Mavericks [duplicate]

I was able to read and write NTFS filesystems normally in Mountain Lion, but after the upgrade this stopped to work. I installed ntfs-3g and fuse4x using homebrew in Mountain Lion and followed the ...
80
votes
13answers
79k views

How to stop OS X from writing Spotlight and Trash files to memory cards and USB sticks?

When plugging a USB stick into a Mac, OS X creates a number of hidden files on the stick, including a Spotlight index and Trash folder. Example from the terminal for a USB stick "Untitled": $ ls -a ...
80
votes
1answer
106k 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 ...
79
votes
9answers
29k views

Is it 'OK' to use the root user as a normal user?

I have enabled the root user on my Mac so I can log into it and run Finder etc. Being the lazy person that I am, just transferred everything from my home directory to /var/root. I'm not too sure of ...
77
votes
16answers
219k 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 ...
73
votes
3answers
33k views

Open Finder window from current Terminal location?

If I am in a specific path in a Terminal window, how can I open that same window in a new Finder window? Note: This is the opposite of opening a Terminal from Finder.
71
votes
11answers
894k views

Ctrl + Alt + Delete: Mac Equivalent?

Ctrl + Alt + Delete on Windows provides a variety of functions, the main one of interest being the Task Manager. Is there an equivalent keyboard shortcut & indeed Task Manager for carrying out ...
70
votes
2answers
11k views

What functionality do 'marks' offer in the El Capitan Terminal?

Since upgrading to OS X El Capitan, I've noticed a change in the Terminal: Executed lines show an opening bracket on the left, and a closing bracket on the right, as shown in this screenshot: ...
70
votes
4answers
134k views

How do you EXIT full screen mode in Yosemite?

OMG, I just discovered the new green button behavior in Yosemite that causes the window to go to full screen instead of maximizing it. That's fine, and I can live with option+click to get the old ...
68
votes
7answers
39k views

Why is it not possible to use the “cut” command to manipulate a file in the Finder?

On OS X 10.6 (Snow Leopard), I don't seem to be able to us the "Cut" command on a file in the Finder, like you can do in Windows Explorer on Microsoft Windows. (In Windows, once you select a file and ...
68
votes
4answers
49k views

How can I make Safari show the URL when I hover over a link?

Safari 5.0.1 on OS X Snow Leopard (10.6) doesn't seem to have any status bar in which the URL of a link shows when the user moves the cursor over a link (without clicking) All other browsers I've ...
66
votes
7answers
47k views

How can I use Gmail as the default mail client app in Mac OS X?

I use Gmail as my e-mail client, but when I click on a "mailto:" link, the Mail.app is opened. Is there a way to avoid the Mail.app opening in this case? Can I open Gmail instead?
65
votes
30answers
168k views

Can anyone recommend an app for creating flowcharts and diagrams?

I'm seeking a Mac app for creating basic flowcharts and similar diagrams. Google has been no help; I've followed dozens of links to apps that either don't exist anymore, I can't find any real ...
64
votes
11answers
27k views

How to move files to trash from command line?

I do a lot of terminal work, and today had the experience of typing rm fileInQuestion.txt Before finding out that I did actually need fileInQuestion.txt. If I'd deleted in the GUI then I would have ...
63
votes
7answers
38k views

Isn't Inactive memory a waste of resources?

I'm looking for explanation of memory usage on my machine especially in light of the example in this screenshot below: I understand what is Free and Active means But what are the meanings of Wired ...
63
votes
7answers
41k views

How can I achieve page-up and page-down in OS X?

I am using MacOSX Snow Leopard. How do I achieve page-up and page-down?
62
votes
4answers
32k views

What are alternatives for Menumeters on El Capitan?

Menumeters no longer works on El Capitan (see here), what are some alternatives? I just want to see my network and CPU stats.
61
votes
9answers
88k views

Why are dot underscore ._ files created, and how can I avoid them?

I am using different operating systems on different machines on different locations. I am using a USB flash disk to keep my files (source codes etc.). I am new to Mac OS X and now I realize there are ...
59
votes
1answer
4k views

Is there a way to rename “Remaining” to “Apple Juice Remaining”?

On a MacBook Pro, is there a way to change the text in the battery life drop down? Specifically, where it says "X:XX Remaining" I want it to say "X:XX of Apple Juice Remaining" Why? Because a good ...
58
votes
9answers
13k views

Remember window sizes and placement when unplugging and replugging second monitor

Here’s something that sucks: Plug in external monitor to laptop (Mac OS X Leopard in my case). Arrange your windows to have the IDE on one screen and browser on another. (Etc etc. Resize, ...
58
votes
5answers
12k views

Prevent redraw of menu bar icons Yosemite

When switching between two screens, all the icons in the menu bar appear to be re-drawn, causing an annoying jittery effect. This started happening after upgrading to Yosemite. Is there any ...
57
votes
17answers
227k views

Is there a way to start the Terminal with a keyboard short cut?

Sort of like the Windows+R command in the windows world? That actually just lets you run a command but you get the idea.
56
votes
1answer
58k views

Disable iPhoto auto launch when connecting an iPhone or iPad [duplicate]

iPhoto starts launching when iPhone is connected even though it never used to before Yosemite. Steps described in: On connecting device - iTunes or iPhotos must not open does not work in Yosemite. ...
56
votes
12answers
102k views

DNS not resolving on Mac OS

Some of my coworkers are having troubles on their Macs - DNS resolution does not work under Mac OS. They're running Snow Leopard 10.6.8. They can use DNS in a Windows 7 virtual machine (VMware Fusion ...
56
votes
1answer
23k views

How can I make ctrl+right/left arrow stop changing Desktops in Lion?

⌃ Control+→ and ⌃ Control+← switches desktops. I actually had this enabled in Spaces on Snow Leopard, but I'd like to turn this off because I use those key combinations when editing in Eclipse. How ...
55
votes
6answers
16k views

How can I activate buttons with just the keyboard?

Many user interface (UI) elements or dialog boxes have buttons. I would like to be able to activate a button with just the keyboard, without the mouse. How can I do this?