“Regardless of whether you’re using the Developer Preview or the forthcoming public beta, bear in mind that OS X Yosemite is beta software,” Peter Cohen writes for iMore.
“It’s best not to install it as the primary operating system on your only Mac, so here are instructions for making a new partition to run it from,” Cohen writes. “This way, Yosemite will be isolated from the rest of your Mac — even if something drastically bad happens, the only bad thing that should happen will be to that partition, not to your entire machine.”
“Partitioning your hard drive will reduce the amount of available space for Mavericks, so make sure to give yourself some wiggle room,” Cohen writes. “What’s more, make sure to give yourself enough space to run Yosemite effectively.”
Read more in the full article here.