OS X 10.8, Mountain Lion

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79
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 ...
62
votes
4answers
27k 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 ...
53
votes
12answers
74k views

How do I turn off App Store notifications in Mountain Lion

The App Store on Mountain Lion pushes update notifications through Notification Center. Unfortunately, this also happens for users that are not system administrators (and so cannot run the App Store). ...
49
votes
7answers
29k 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 ...
46
votes
8answers
100k 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 ...
35
votes
9answers
116k views

How can I view hidden files in the Finder?

I noticed that whenever I add files and delete them, their physical space remains on the disk drive. I uninstalled NTFS Tuxera and I still have the same problem. So I had to insert the disk under my ...
34
votes
5answers
17k views

Where are system environment variables set in Mountain Lion?

In Lion (and previous releases) it was in .MacOSX/environment.plist. After upgrading to 10.8, the file is still there, but the variables aren’t taking. I’ve also tried adding them to ...
33
votes
3answers
40k views

Mountain Lion with Java 7 only

I performed a clean installation of Mountain Lion and installed JDK7. java -version in Terminal returns java version "1.7.0_05" correctly, still Java Preferences and some other Java programs (such as ...
32
votes
3answers
2k views

What's the dot in the centre of the red window close button for?

When I'm working with certain applications / windows in Mac OS X (I'm using 10.8, although I'm not sure that's relevant), I sometimes see a black dot in the centre of the red window close button. What ...
31
votes
5answers
4k views

Is there a way to access a Mac's geolocation from terminal?

(Note the Mountain Lion update at end of question) Some GUI apps use OS X location services, but I want to retrieve a Mac's physical location from the command line. This could be useful for running ...
27
votes
4answers
6k views

How can I open a single app by an unidentified developer without allowing all

I know to secure safety it is now not allowed anymore to open apps that were not downloaded from the mac app store. But surely there is a workaround for this to open an app that you know is 'good' ...
26
votes
4answers
13k views

Sendmail Error on OS X Mountain Lion

I get an error when trying to run sendmail. I am on OS X 10.8 Mountain Lion. sendmail: fatal: chdir /Library/Server/Mail/Data/spool: No such file or directory
26
votes
2answers
94k views

Creating A Bootable USB Of Windows 8.1 On OS X?

Reasons for wanting create such a usb include: PC is unbootable and you want to prepare a bootable USB using the ISO file that you have on your external hard drive. to install Windows 8.1 on Mac ...
25
votes
5answers
13k views

How can I modify the list of Applications under 'Open With…'?

I recently went to open an audio file, and wanted to open it in an editor instead of a player. I right-clicked it, hovered over 'Open With...' and was met with a very unsightly list. I have seen a ...
24
votes
4answers
20k views

Where did Icon Composer go from Xcode?

I can't seem to find Icon Composer on the Xcode versions at run on Mountain Lion. Where is it? Has it been taken out? How to get it back?
23
votes
4answers
23k views

How can I switch between the two Java versions in Mountain Lion now that Java Preferences is gone?

I have two versions of Java installed with Mountain Lion: Apple's Java 6 Update 37 (Java for OS X 2012-006) Oracle's Java 7. The update from Apple removes Java Preferences. In another question ...
23
votes
7answers
7k views

How can I permanently dismiss Updates Available notifications?

With the Notification Center in Mountain Lion, I get an alert when software updates are available. The problem is, my only options are 'Details' and 'Update'. I don't want to interrupt my work to ...
22
votes
1answer
13k views

Can I still set my account picture to an image from disk in OS X Mountain Lion?

I can't seem to browse my hard disk for a custom image to use as my account picture anymore since installing OS X Mountain Lion. The new popover shows that I can now only choose from the default set ...
21
votes
2answers
78k views

What is Mobile Sync - Backup and why is it taking so much space?

I was checking my directory and found out that the Folder Backup in Library > Application Support > Mobile Sync > Backup, is taking 13GB of my Harddisk ... What is this and why is taking so much space ...
21
votes
7answers
21k 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 ...
21
votes
3answers
26k views

How to always show “Library” in the Finder its “Go”-Menu without holding a modifier key?

I often use the "Library" folder in my home folder ~/. The Library folder there (~/Library/) is shown (unhidden), and that is not the question. I would like to also always show the menu point ...
20
votes
1answer
7k views

How to fix Safari 6 on Mountain Lion that doesn't show the full URL in the address bar unless I click it?

For instance, Ask Question page URL on this site is shown as apple.stackexchange.com, but when I focus on address bar, it becomes apple.stackexchange.com/questions/ask. I tried resetting and ...
20
votes
2answers
6k views

Why ever does Parallels 8 recommend max 4 GB RAM for a VM?

I'm a VMware Fusion user and am trying out Parallels since VMware has some quirks that are annoying on Mountain Lion on a retina MacBook Pro (16 GB RAM). I'm wondering about the baffling Parallels ...
19
votes
12answers
46k views

Will Mountain Lion make an older computer run faster or slower?

Performance/responsiveness is a common concern with new software, especially on older machines. In general, upgrading from Snow Leopard (10.6) to Lion (10.7) wasn't too bad, but now Mountain Lion ...
19
votes
2answers
9k views

How to compile mod_wsgi, mod_fastcgi, etc on Mountain Lion (Mavericks) by fixing `apxs:Error: Command failed with rc=65536`?

I've updated to OS X Mountain Lion. Update has removed all of my python and apache modules including mod_wsgi. Now I'm trying to recompile mod_wsgi (it compiled without problems on Lion). I use ...
19
votes
4answers
166k views

Roll back from OS X Mavericks ( or any newer OS) to Mountain Lion

I installed the developer preview of OS X Mavericks, & too many things broke. I can't stay on it & need to roll back to Mountain Lion. Any ways of doing that? Please help! I originally ...
19
votes
4answers
17k views

How do I get my user directory working for web sharing again?

I had web sharing enabled in Lion and a web site at http://localhost/~user, where user is my User directory. When I upgraded to Mountain Lion, web sharing (Apache) remained enabled and I can go to ...
19
votes
2answers
6k views

Change location of notification center alerts

Is it possible to change where alerts in the notification center appear on the screen? Alerts appearing in the top right tend to cover up work I'm doing more often than not and I would prefer, say, ...
18
votes
9answers
31k views

How to view logs in Airport Utility v6, or install 5.6 in Mountain Lion?

So I just upgraded to Mountain Lion, and I'm watching some Netflix over my Apple TV, when it stops streaming and tells me it's not connected to the network any more. Sure enough, my Air has also lost ...
18
votes
3answers
5k views

How to make TextEdit open with a blank file by default?

In Lion, TextEdit used to open with a blank file by default. On Mountain Lion, it launches with a file picker by default — either for choosing to store the file in iCloud or for opening a local file. ...
18
votes
4answers
10k views

Delay in keyboard responsiveness after wake with Mountain Lion?

After upgrading to Mountain Lion, now when I open the lid to my 2010 13" MacBook Air, there is a 3-5 second delay between when the screen powers on and when the keyboard will respond to key presses in ...
18
votes
1answer
3k views

How to disable or delay “Time Machine hasn't backed up your computer in x days” message?

Mountain Lion has a very useful feature where it can alternate between multiple backup destinations. I use this to back up to both a network share at home and an external drive I keep offsite. Because ...
17
votes
6answers
83k views

How to mimic Safari 5 Activity window with Mountain Lion, to save FLV video files?

With Safari 5 in Lion, I used the Activity window to save video files. Safari 6 has no Activity window. With Mountain Lion, what is the best way to replicate what I could do before?
17
votes
4answers
9k views

Why does Apple not support Power Nap on some of the Macs that have Power Nap capability?

Apple has already released the OS X Mountain Lion Technical Specifications which lists some Macs as excluded from certain features of Mountain Lion including: Power Nap When is a Mac excluded from ...
17
votes
7answers
7k views

How can I enable Trackpad tap-to-click for the login window in OS X 10.8?

In older OS X versions, this used to work just fine: defaults write /Library/Preferences/.GlobalPreferences com.apple.mouse.tapBehavior -int 1 It would enable tap to click for built-in MacBook ...
16
votes
1answer
9k views

Is there a way to hide the unread count badge in Mountain Lion's Mail.app?

Mail.app used to have the ability to hide the unread count badge, as shown on this 37signals blog post: It seems that Apple has removed this in OS X 10.8 Mountain Lion. Is there any way to restore ...
16
votes
8answers
2k views

What features from Lion will be lost when upgrading to Mountain Lion?

I know Mountain Lion has some cool new features that Lion did not have, but will it overwrite any of Lion's functionality?
16
votes
4answers
9k views

How to re-download Lion from Mountain Lion

I'm currently running Mountain Lion, but I'd like to redownload Lion (to create a bootable install drive). However, when I click the download button in the App Store, I receive a message telling me my ...
16
votes
2answers
7k views

Mountain Lion sleeps too aggressively

For me, Mountain Lion always seems to sleep whenever there is no user action, even when the computer is still doing something. In my case it always sleeps in the middle of running a batch operation in ...
16
votes
4answers
10k views

How to get the hand tool back in Preview.app in 10.8?

In Mountain Lion's Preview.app the toolbar was changed quite drastically. While I can see why they did it, I found that it misses the Hand tool that one can use to move enlarged documents around with ...
16
votes
4answers
9k views

How can I force Mountain Lion's Messages app to refresh a conversation?

Sometimes when an iMessage comes in and I switch to the Messages app, the conversation doesn't contain the new message. I know the message was received because an alert banner popped up with the ...
15
votes
2answers
6k views

Is there a way to completely disable Dock?

I want the Dock completely gone. I haven't used it in the past three releases of OS X (10.5 to present). I want it completely gone, and LaunchBar there instead. Is there a way to kill the Dock so ...
15
votes
1answer
751 views

How do I remove the iCloud-first behavior in Mountain Lion?

In Mountain Lion, I have iCloud activated for Documents. I'd like document-saved-in-the-cloud to be an option, but not the default, as in "if I choose iCloud from the dropdown, save in iCloud, else ...
15
votes
4answers
24k views

How does the Finder refresh in OS X Mountain Lion?

I just batch edited some pictures with Preview and changed the name of one file in the Preview window. Minutes later, Finder still didn't show the changed file sizes (not even when opening the Info ...
15
votes
3answers
12k views

How to hide notification center button in Mountain Lion?

I am using Mountain Lion. The only advantage (for me) over the gesture is that Option + clicking the button enables/disables showing alerts and banners (toggles the switch in the notifications ...
14
votes
6answers
5k views

How can I expand the number of special characters I can type using my keyboard?

I am aware that when I press ⌥ or ⇧⌥ on my Mac, I can type a variety of special characters. I also know that I can insert special characters using the character palette. Is there a way to expand the ...
14
votes
3answers
14k views

How to change the default Mail account in Mountain Lion?

I have 2 mail accounts configured. When composing a new message, it will default to the account for the currently selected mailbox, which is fine. However, when no particular mailbox is selected (when ...
14
votes
2answers
8k views

Why does my Mac's list of “Open with” applications start listing the apps twice and sometimes three times?

When I right-click on a file on my Mac OS desktop and then in the contextual menu, I move to the "Open with...", the list of potential applications to "open with" has applications listed multiple ...
14
votes
3answers
6k views

How do I have Safari 6 ask before quitting (to avoid accidental quits)?

Safari used to have a preference option to confirm before quitting, now that has disappeared. It's so easy to quit accidentally and lose all your tabs. I know you can resume or re-open the previous ...
14
votes
2answers
11k views

Why are some Mail messages shown as empty with “This message has no content”?

Sometimes new messages come in and Mail (on OS X Lion and Mountain Lion) shows them as empty, with "This message has no content" in the preview column. The message is empty in the full message view ...