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De-installing Mavericks, Re-installing Mountain Lion

F

filmboy

macrumors member
Original poster
Dec 1, 2013
48
11
I'm purchasing a new 27" iMac this weekend, and as it will be newly configured, it will come with Mavericks pre-installed. However I would like to de-intall Mavericks and re-install Mountain Lion so that I can continue to edit video in Final Cut Pro 7.

Is this possible and easy and if so, please share instructions.

Thanks!
 
filmboy said:
I'm purchasing a new 27" iMac this weekend, and as it will be newly configured, it will come with Mavericks pre-installed. However I would like to de-intall Mavericks and re-install Mountain Lion so that I can continue to edit video in Final Cut Pro 7.

Is this possible and easy and if so, please share instructions.

Thanks!
Click to expand...

Easy enough if you have ever installed an operating system.

1. Boot with Mountain Lion installer.
2. When you get to the start of the install process the X screen choose the Utilities option at the top then Disk Utility.
3. Select drive partition that already has the Mavericks installed on it choose erase then erase it.
4. Quit Disk Utility then proceed to install Mountain Lion.
5. Once completed migrate your existing data/applications or install/copy them over afterwards.
 
As far as I know, you cannot install an older operating system to the macs that comes with the newer version.
 
ufkdo said:
As far as I know, you cannot install an older operating system to the macs that comes with the newer version.
Click to expand...

If the machine existed when the older OS was in release then you can install on it as it would be installable then, that is only for newer machine the old OS would not know about. For example my 5,1 came with Lion that lasted about five minutes before I installed Snow Leopard on it.

Edit: Now I have thought about it I bought that so late in the cycle I was eligible for the free Mountain Lion upgrade so I went back two revisions of the OS on that SL install..
 
Last edited:
MacUser2525 said:
If the machine existed when the older OS was in release then you can install on it as it would be installable then, that is only for newer machine the old OS would not know about. For example my 5,1 came with Lion that lasted about five minutes before I installed Snow Leopard on it.
Click to expand...

I see. Thanks :)
 
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