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After I've reinstalled Mac OS X 10.8 and transfered my back-up folders to my MacBook Pro (late 2011), all Mac OS apps started to crash as I open them. I'm talking about apps like Mail, Safari, Keychain Access, System Preferences, but also some other apps like Xcode or Skype. I've tried to format the whole HDD and re-intall the OS and retransfer my back-up files, nothing changed. I also can't access some sites like or do some googling directly from the navigation bar of Google Chrome - it says that the webpage is not available (not sure if the issues are related but started at the same time).

What should I do to use the computer correctly?

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Most likely there is some error in config files in your backup that is causing the crashes. Reinstall 10.8, but don't restore your backups yet, just keep them in an accessible place. Reboot and verify that things work properly. Then, start transferring your backups over a little bit at a time and see where the problem is. This is just a guess, but since most personal configurations are stored in the Library folder in your home directory (/Users/YourLoginName/Library) I would hold off on that folder until the very end. Unfortunately, it can become a very large folder, so you'll have to transfer subdirectories of ~/Library one at a time, and especially the subdirectories of ~/Library/Application Support, as this is the most likely place where the error is.

If you run into problems along the way, post at Ask Different, a sister site to this one (your login should transfer over) that is specifically about Apple software and hardware.

Good luck!

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How do I transfer backups over a little bit at a time? I'm just using restore from Time Machine Back-up... – moray95 Jun 1 '13 at 14:19
what exactly are you restoring from Time Machine? If you've backed up your entire system, and are then replacing it after reinstalling, you haven't really done anything. Does your computer work if you reinstall, but don't restore anything yet? – MattDMo Jun 1 '13 at 16:27
After re-installing the OS, I'm chosing restore files from time machine back-up while setting up the system. When I don't restore anything, all works fine. – moray95 Jun 1 '13 at 16:31
well, Time Machine is acting up on my computer at the moment, so I can't walk you through it, unfortunately. So, don't choose to restore files when setting up the system, because you aren't given the option of choosing which to restore, right? Then, after you reboot into your clean install, you should be able to open Time Machine and choose what to restore, hopefully on a directory by directory basis. Try restoring everything except /Users/UserName/Library/Application Support and see if that has any effect. If that works OK, try restoring directories inside the (continued)... – MattDMo Jun 1 '13 at 16:43
/Users/UserName/Library/Application Support hierarchy, except the Apple directory. Maybe start with one or two innocuous applications at first, and verify that they work, then restore some more. – MattDMo Jun 1 '13 at 16:45

I'd also try to do an upgrade install of OS X from the recovery partition. It should replace system files with the initial versions but keep most user files and setting in place. It fixed an issue I had where different processes crashed on launch.

If that doesn't work, do a clean reinstall again, but restore only a part of the files. You can use Migration Assistant to transfer only users or settings, but I have always just copied files manually from Finder.

I don't think it's likely that the issues are caused by files in the Application Support directory though.

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What's an upgrade install? If you talking about re-installing the OS, I've done it many times. – moray95 Jun 3 '13 at 11:22
I meant choosing Reinstall OS X from the recovery partition without erasing the OS X volume first. "Reinstalling OS X" is ambiguous because it can mean a clean reinstall (like you did earlier) or an upgrade install (patching the current installation). – user495470 Jun 3 '13 at 12:00
I've also reinstalled the OS from recovery partition without formatting, nothing changes – moray95 Jun 3 '13 at 12:06

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