Booting up older version of OSX with Superduper

[Ronin64]

Hi,
I use Superduper to backup my Mac and was wondering if I make a bootable copy of my hard drive and then update to the Yosemite beta, will I be able to to boot up the older version of OSX on the hard drive if I need to.

Thanks in advance.

 

[old-wiz]

Shouldn't be a problem, but test boot the external before installing anything on the internal.

 

[Dave Braine]

Yes, you will. But as old-wiz says, make your clone and then check that it works before installing Yosemite.