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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83
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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 ...
71
votes
13answers
73k views

Write in NTFS using Mavericks

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 ...
172
votes
7answers
79k 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 ...
55
votes
5answers
11k 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 ...
82
votes
9answers
62k 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.)
77
votes
9answers
49k 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. ...
33
votes
6answers
18k views

How to set PATH for Finder-launched applications

Apps launched via Finder seem to not respect the PATH as set in .bash_profile. So when I try to run code from an IDE (Intellij) I no longer have access to programs in /usr/local/bin, which is ...
50
votes
5answers
28k views

Are Macs vulnerable to the Bash shellshock bug?

Red Hat recently announced a major security-related bug in the Bash shell. Some are calling it the "shellshock" bug. Since OS X is built off of Unix, is it vulnerable to attacks that exploit this bug? ...
19
votes
13answers
8k views

What orthodox file manager for OS X could I use?

I'm looking for a graphical file manager fro OS X, for console Midnight Commander is ok. I need two panels, function keys operations and preferably FTP and SCP support. Also, it would be great to be ...
51
votes
7answers
35k views

I am missing the option to see the remaining battery life as time in the menubar?

In previous versions of OS X the battery indicator in the menubar included options to show the remaining battery life as percentage or time (or nothing). In Mountain Lion, there's only an option to ...
20
votes
2answers
8k views

What's the correctly way to make Postfix run permanently on Lion (not server)

I can start Postfix temporarily with: $ sudo launchctl launchd% start org.postfix.master However, Console.app shows that it only runs for a short time: 26/11/11 2:00:55.710 PM postfix/master: ...
50
votes
3answers
3k views

Where did the ~/Library folder go in Lion?

I just installed Lion, and I can't find the Library folder in my user folder. Does the folder no longer exist? If it doesn't, where are my preferences? If it does, how do I get to it?
23
votes
15answers
15k views

Lock Screen Command One-Liner

I'm trying to find out whether there is any kind of equivalent command line one-liner which replicates the exact identical functionality of the 'Lock Screen' menu option available via the Keychain app ...
12
votes
30answers
5k views

What are some great OS X games? [closed]

Despite being a "subjective" question, it is a useful one for newcomers to the Apple platform, and serves to aide the lacking gaming community. What are your favorite OS X games? Rules: Limit to ...
46
votes
5answers
27k views

How do I run an app in Full Screen mode on OS X Lion on my second monitor?

How do I get an app to run in Full Screen mode on OS X Lion on my second monitor? It seems to be stuck on my first monitor, and I'd like to move it.
24
votes
7answers
28k views

What Is the Keyboard Shortcut for Sleep Display Without Eject Key?

I read that if you want to put your display into sleep the keyboard shortcut is Control ⌃+Shift ⇧+Eject ⏏, but what is it in Mountain Lion or Lion using a retina MacBook Pro or MacBook Air without an ...
8
votes
1answer
4k views

Why is it that my Mac would rather swap than clear inactive memory?

Why is it that my Mac (running 10.8 Mountain Lion) would rather swap than clear inactive memory? I know people say that the Mac OS manages itself and whatever, but there is a serious performance dip ...
6
votes
2answers
5k views

In Mountain Lion how do I set, in one place, the PATH environment variable for all newly launched applications?

On Ask Different there are many questions regarding the PATH environment variable and how to set it for applications launched by a shell, by spotlight or via the finder (typical questions: How to set ...
23
votes
2answers
40k views

Why Mac OS X don't source ~/.bashrc [duplicate]

I found a lot of people figuring out why instruction similar to this : Put X to your ~/.bashrc and you can do Y don't work. It always turns out that Mac OS X's bash's startup files (or Mac's ...
23
votes
4answers
14k views

How to set to open folder with enter in finder?

I want to set to open a folder in finder with Enter. I know it's possible to open a folder with ⌘ Command + ↓ Down Arrow but I don't like it and I never use it because it's easier to use the ...
16
votes
3answers
4k views

How do I find the windowid to pass to screencapture -l?

The command line utility screencapture claims to be able to capture a single window without requiring interaction, but I can't figure out what to pass it. -l<windowid> capture this windowsid ...
25
votes
9answers
16k views

Is there a good command-line ID3 tool for OS X?

Anyone know of a command-line* ID3 tool, with support for ID3v2, that you can get working on Mac OS X with reasonable effort? It should support both reading and writing tags. (* I want to be able to ...
16
votes
3answers
18k views

How to hide computer name and user name in terminal command prompt

How can I hide username and computer in terminal command prompt? In Terminal it says Last login: Mon Jan 13 00:00:14 on ttys000 Whatever:~ UserName$ Is it possible to show just the current ...
14
votes
4answers
4k views

How to permanently put TextEdit in the Open with… menu list?

I'm a developer and often dealing with unusual file types. If I want to open one of these files in TextEdit, I have to start it first and then open the file with it, or drag the file to the TextEdit ...
11
votes
6answers
7k views

How can I use NTFS partitions in OS X?

My coworkers use NTFS partitions, and I can't share my data with them, as NTFS on Mac OS X is read-only. How can I read and write onto NTFS partitions?
5
votes
2answers
3k views

How can I export text substitutions from Lion for import into Mountain Lion

I am trying to migrate to a brand new install of Mountain Lion. I am trying to migrate select data from my old Lion install. Does anybody know where the text replacement definitions in System ...
20
votes
3answers
6k views

When opening a DMG file, how do I get it to open up in front of the windows?

Whenever I download a .dmg file and then open it (usually from the download bar in Chrome), it opens up in the background. Is there any way to get it to open up in front of my window? Edit To ...
14
votes
6answers
51k views

Move 'Pictures', 'Documents', 'Movies' etc folders

I would like to move folders like 'Pictures', 'Documents', 'Movies' to a different from default under the root of user's home location, preferably into a sub-folder under the same user's home folder. ...
10
votes
5answers
9k views

Uncheck “Reopen windows when logging back in” by default

The shutdown/restart dialog has a check-box Reopen windows when logging back in which is checked by default. I need to change its behavior to be unchecked by default. Is this possible? If yes, how can ...
9
votes
2answers
2k views

Is there a way to disable OS X auto termination of applications?

Is there a way to tell OS X Lion to disable auto-termination for a given application that you do not want to auto terminate? FYI Lion is a quitter if you did not already know, what if you don't want ...
23
votes
5answers
7k views

What is this symbol? ⎋ (it is listed as menu shortcut)

The shortcut that is reported in the -menu, for Force Quit menu-item, is ⌥⌘⎋ (the last character is the Unicode broken circle with northwest arrow). What key should I press to invoke the Force Quit ...
14
votes
5answers
91k views

Is AirDrop possible between iPad, iPhone and MacBook?

A new MacBook came with something called AirDrop and worked between many MacBooks such as MacBook Pro and MacBook Air. Can I also use AirDrop to exchange data between Macs and iOS devices?
11
votes
3answers
2k views

Problem with “Always Open With” in OS X

I want know how can I apply a software to open all my same document, for example I want to open all my PDF document with Skim but when I right click on it> open with > other and choose my desired ...
6
votes
1answer
819 views

Emacsify OSX throughout: word-forward (⌥ + F) and word-backward (⌥ + B) instead of 'special characters'?

Yes, the OSX already supports ⌥+← and ⌥+→ for moving the cursor word-backward and word-forward, but reaching for arrow keys is annoying. So, why not rather have ⌥+B and ⌥+F do this? I mean, not once ...
5
votes
1answer
4k views

Why is a command line change to ~/Library/Preferences/com.apple.LaunchServices.plist not effective immediately?

When the Info window of Finder is used to associate files of a particular type with an application: the preference is effective immediately. When Terminal is used to make a comparable addition ...
4
votes
2answers
1k views

Icons remains the same after I have changed the default program for opening the file

I have just uninstalled a program from my new mac. The program was making itself default to open all .r files. I installed a new program, and I maked it default for opening .r files, but the old icon ...
12
votes
2answers
5k views

keyboard no longer repeats keys when held down

I just wanted to make some input where I press a key and the auto-repeat function engages so I don't have to press the 0 key many times to make a long number. 10000000000000000000000000000 This has ...
8
votes
2answers
2k views

Enable click-through, preferrably for all applications

I would like to enable click-through on all windows. Is this possible on Lion? To be more specific, "click-through" as defined by Apple in the Mac OS X Human Interface Guidelines means "that the user ...
8
votes
4answers
900 views

How do I change the location of screen captures on 10.5?

As a developer, I take a lot of screen captures. I often take a lot to share with StackExchange members on chat. The problem is my desktop is so cluttered with screen captures that they're now ...
5
votes
2answers
265 views

Faster Press and Hold Character Picker

Does anyone know how to make the character picker appear more quickly? I use it enough now in my German language studies that it has become second nature for the critical marks and much faster than ...
12
votes
2answers
4k views

Can I force my Mac to make better use of the inactive memory?

I use mysql and it takes up to 2.5 GB of my ram. I checked activity monitor and saw that I have 1GB of inactive memory but it never changes even if I have only 10MB active free memory. Is there any ...
10
votes
3answers
18k views

How do I run a jar when I double-click it?

So, I double click on my jar file and it just blinks a window with white screen then it disappears. After that, I right-click and select "Open with jar launcher" it is the same. too. I opened up ...
5
votes
3answers
577 views

Window management app on mac os x?

I currently use "Stay," and have tried other tools (haven't really loved any of them), but I am looking for a window management tool that does the following: Store my window locations Have a ...
2
votes
1answer
3k views

New version of Keynote won't open old versions

When using a newer version of iWork software such as on Yosemite to open older documents and presentations, Pages reports "This document can’t be opened because it’s too old. To open it, save it with ...
2
votes
4answers
9k views

How to persistently define aliases in Terminal

I want to add aliases to my environment so that they are available in all Terminal instances. I got this answer: Yes, you can put it in your .bashrc, .bash_profile or .profile. On some systems ...
4
votes
2answers
33k views

Can I change the font systemwide (10.8.3) [duplicate]

Is it possible to change the systems font? (finder, alerts, menus etc)
3
votes
2answers
3k views

Finder Reports Disk is Full, Other Tools Don't Account for it

I looked at some of the other Q&A here and didn't see a duplicate of this one (e.g., How can I figure out what's slowly eating my HD space? and other linked and related questions). Finder reports ...
3
votes
2answers
3k views

How can I fix permission issue when I cannot start Mac OS X?

I was creating a guest account and to prevent it from accessing the Macintosh HD as in other applications and stuff I assigned it as in "No Access" When I switched to the guest account everything ...
2
votes
2answers
2k views

How to restore system from network drive?

I have a 2014 MacBook Pro. I want to restore my OS from a Time Machine backup which is on a shared network volume. When I restart in recovery (Apple-Opt-R), it boots from internet, but if I try to ...
2
votes
2answers
2k views

Shortcuts to label files in Finder

Are there any shortcuts to label a file in Finder? The fastest way i know is to place an icon in the menubar, but it would be much better when i can do it with the keyboard.