Can I run two versions of OS X on the same Mac?
My present iMac is one of the first 20" Intel models running OS X 10.6.8. I feel that soon it will need replacing. I have a number of apps requiring the installation of Rosetta, and also iDVD, which I am led to understand will not run on Yosemite. Therefore would it be possible to partition the drive and install OS X 10.6.8 in parallel with Yosemite, allowing me the use of my apps including iDVD? Anthony J Brookes You can dual-boot different versions of OS X, but you may have problems persuading the standard drivers that shipped with Snow Leopard, to work with the hardware in a modern Mac. There are ways around this - mixing and matching some of the newer drivers with the older OS kernel, for example. But they all fall in the category of things you do for the sake of the challenge.
I wouldn’t do any of this. I’m struggling to believe that there are PowerPC apps so essential that it’s worth the hassle. When iDVD was dropped, I moaned about it along with everyone else. But no one burns DVDs any more. Video is easy to stream and USB memory sticks hold more data.
If you are determined to keep using DVDs, you can use an external drive and third-party software, like Roxio Toast. But I suggest you keep the old iMac, while you get used to Yosemite and a DVD-less world. I think you’ll be surprised by how quickly you wean yourself off burning discs.