Can Time Machine reload an older system ?

Yeah, like I have been using Mt.Lion (10.8.5) for a long time on my Late 2012 iMac (13,1)
I want to try Yosemite so I can get a nice free Logic Pro X upgrade for my music.
If I make the plunge and go for Yosemite and it does not work out….
Can I revert back to Mt. Lion using Time Machine backups ???
Can time machine do that ??
Thanks

Hey TTabby,
You can revert to a previous version of OS X by following the steps in the article below. Look it over in case you need to go back like you are suggesting 
OS X Yosemite: Revert to a previous OS X version
http://support.apple.com/kb/PH18846
Regards,
-Norm G.

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