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Speed up your OS... turn Autosave & Versions off globally

If you're experiencing slow opening apps or windows since upgrading to Mountain Lion... as I have... and you don't want your OS to automatically save your TextEdit files, etc. then simply disable Autosave and Versions via Terminal.


Open Terminal and enter this command which will turn off Autosave & Versions globally:


defaults write -g ApplePersistence -bool no


Now reboot.


Voila!


I experienced a very noticeable speed increase when opening apps and even opening some previously slow opening Dock folders after doing the above.


If for some reason in the future you want to turn Autosave and Versions back on just change 'no' to 'yes'


Feel the speed!

iMac, OS X Mountain Lion, 27" iMac 32" secondary monitor

Posted on Jul 30, 2012 8:17 AM

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70 replies

Jul 30, 2012 10:29 AM in response to RonL

I'm offering an alternative perspective, Ron, on your claim of 'speed up your OS'. I think people should be informed that there is another side to this story.


No need to take it personally. That's the whole point of forums, to keep people informed and offer different perspectives.


I really haven't got anything else to say on this that I haven't already said and a flaming war I don't need, so over and out from me on this one.

Jul 30, 2012 10:36 AM in response to raftr

raftr,


Sorry to hear you're getting an error message.


Is it immediately after you reboot?


Is it when you try to save a particular type of file?


Is it occuring after you have let your system set idle for a few minutes?


Do you have Time Machine running? (I don't)


Trying to figure this out why it works for some and not for others.

Jul 30, 2012 11:45 AM in response to RonL

A rather important note. Once you enter the Terminal command to turn Autosave/Versions off, you must restart or logoff and log back in. You need to do that as the change won't be read by the OS until you do.


I tried a test with TextEdit. Opened a new document, typed the text Original and saved it. I then opened the file and added another line. Then chose Save As. The new document had the changes, and they were not applied to the first document.


Another thing there. Once I restarted, TextEdit no longer had Duplicate in its menu and Save As became Command+Shift+S, without the Option key.

Jul 30, 2012 12:19 PM in response to Kurt Lang

This info is just to verify my last post, and what actually happens.


For those who have tried the Terminal command, it's is very important that you restart after entering it. The change is not read or acted on by the OS until you restart and it reads the contents of the hidden .GlobalPreferences.plist in your user account. Once you restart, then things change. Here's the difference between Preview and TextEdit with the option on (default) and off.


Preview's menu appears like this by default:


User uploaded file


After entering the Terminal command and restarting, it becomes this:


User uploaded file


Duplicate disappears from the menu, but so does Save As. So you lose that ability with Preview. You can only Save. If you have the option in the System Preferences on to ask if you want to save changes when closing a document, then default button to cancel is "Revert to Saved". After the command, it becomes the older style "Don't Save". So the main loss with Preview is there is no Save As at all. Not even Duplicate.


TextEdit's menu appears like this by default:


User uploaded file


After the Terminal command, it becomes this:


User uploaded file


Duplicate goes away and is replace by Save As with the long standard Command+Shift+S keystroke. And it works just as you would expect. You can make all of the modifications you want to a text document and do a Save As. The new document has all of the changes, and the original closes unaltered.

Speed up your OS... turn Autosave & Versions off globally

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