How to Dual Boot Mountain Lion and Lion on New iMac

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Hello,

I recenetly purchased a new iMac (Late 2012 model) with Mountain Lion installed on it. My previous Mac runs Lion. I am an iOS App developer and I still have a few apps which I need to support older devices for and need to run an earlier version of xCode than is allowed on Mountain Lion. My hope was to setup a dual boot system with both Lion and Mountain Lion to do this. So far I have not been able to figure this out. I've tried to follow walkthroughs on the web, but they all had Lion and were making a Mountain Lion partition. Any input would be much appreciated.


Thanks,
Scott
 

chscag

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Your Mac's Specs
2017 27" iMac, 10.5" iPad Pro, iPhone 8, iPhone 11, iPhone 12 Mini, Numerous iPods, Monterey
Since you have a new 2012 iMac, it's only designed to run Mountain Lion as that is what it was pre-installed with. You may be able to use an external hard drive loaded with Lion and bootable. I'm not sure if even that will work though.
 

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