HT201364 How can I revert to OS MAVERICK from OS YOSEMITE on my Mackbook Mid 2010?

How can I revert to OS MAVERICK from OS YOSEMITE on my Mackbook Mid 2010?

Do a backup, preferably 2 separate ones on 2 separate drives.
Revert to a Previous OS X - Yosemite
Revert Yosemite to Mavericks
If you do revert, I'd use Setup Assistant to restore your data. This process takes a while, so do it when you won't need the computer for several hours, based on my experience.

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The new user then simply registers his "new" device, also online. Once you have deleted ownership, the serial number is freed for a user (new owner) to add it. The new owner should obtain an Apple ID first.

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Is there a way that I can revert back to IOS7 from IOS8 after install on both iPhone and an IPad?
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I know I should always back up before any updates, but I'm hoping the fact that I did not might be of help in my case.
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Welcome to the Apple Support Communities
You have different problems with a Late 2012 iMac and Snow Leopard:
1. The firmware doesn't allow you to run it.
2. Snow Leopard isn't compatible because it hasn't got the drivers for the hardware of the iMac. Furthermore, you can only run OS X 10.8.1, 10.8.2 or 10.8.3 on a Late 2012 iMac at the moment, because older versions haven't got the drivers it needs.
3. It's illegal.
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Only the 27-inch iMac and Mid 2011 and newer iMacs can be used as an external screen, so you can't use your Mac as an external screen. See > http://support.apple.com/kb/PH11302
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Downgrading the iOS is not supported by Apple.
Try:
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https://discussions.apple.com/thread/4676111?tstart=0\\
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''Duplicate post, continue here - [https://support.mozilla.com/en-US/questions/816154]''
firefox 4 is not compatible with the skin i had been using for my browser, old factory black... i would prefer to keep this skin rather than use firefox 4... how can i revert back to the previous version of firefox?...

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Hello,
I've had it. I can't take Lion any more!! I am one of the idiots who downloaded Lion the first hour it became available. Since then, my life has become a nightmare. Lion is so buggy---Apple blew it big time with this software. Multiple crashes every day, I've lost thousands of saved emails, my calendar is all messed up....I am at my wit's end and I want NOTHING to do with Lion any more.
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Bonjour,
C'est ma première intervention aussi je ne sais pas si je peux m'exprimer en français.
Je tente!
Lors du passage à Maveicks, j'ai basculé sur Thunderbird car je ne souhaitais pas utiliser POP mais Mail ne le permettait pas (du moins je n'ai pas réussi)
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HT201364 How can I revert to OS MAVERICK from OS YOSEMITE on my Mackbook Mid 2010?

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