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Can I have two versions of OSX running on same machine?

Hi - since upgrading from Snow Leopard to Mountain Lion recently I have run into an unexpected problem (though I'm sure there would have been a warning that I missed). Some of my older applications, such as Adobe Creative Suite version 1, no longer run with the new OS. My plan is to install an additional hard drive in my Mac Pro (2009 dual Xeon version) and go back to my original software (Tiger) and install that on the new drive, then update to Snow Leopard with that software package. I will then, hopefully, be able to install CS1 on that drive.

Am I likely to encounter any problems doing this? I will effectively have two different OSXs running on the same machine, albeit on differnt drives.

Thank you in anticipation,

John Irvine

Banchory, Scotland.

Final Cut Pro X, OS X Mountain Lion (10.8.4)

Posted on Sep 4, 2013 12:10 AM

16 replies

The hatter

Level 9

60,990 points

Mar 3, 2014 8:40 AM in response to johnfrombanchory

it has to be retail, can't be the OEM gray disc from another Mac specific model.

OEM for that specific Mac is always acceptable.

Even OEM DVDs can be trouble. ie, 2009 4,1 came with 10.5.7 and had serious heat problems with audio, iTunes and heat and was only corrected with 10.6.2+

The OEM for a 2010 Mac Pro may or may not work, but not for another line of Macs, and Snow Leopard should and was it? the 10.6.x Retail DVD.

Can I have two versions of OSX running on same machine?