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Worth it to install Mountain Lion on early 2007 iMac

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iMac -Sierra- 27"Retina 5K, Late 2015, 3.2 GHz, i5, 8 GB 1867 MHz DDR3, 250 GB SSD
I am about to reinstall my s/w on my iMac to try and cure some bugs. I am running Lion on a 2.16

I was wondering if I should upgrade to Mountain Lion? Would I regret it? Lion caused a lot of angst when i installed it.
 

pigoo3

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2011 17" MBP 2.2ghz, 16gig ram, OS 10.11.6
I am running Lion on a 2.16

I was wondering if I should upgrade to Mountain Lion? Would I regret it? Lion caused a lot of angst when i installed it.
Assuming I got your model iMac correct. The easy answer is…this model iMac cannot run Mountain Lion. "Lion" (OS 10.7.5) is the max. OS for this model.

- Nick
 
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pigoo3,
OK that makes sense. Thanks for the info.
 
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