Want to Beta Test OS X Yosemite? Sign Up for the Official Beta Program
If you can’t wait until the fall to get your hands on OS X Yosemite, and you don’t want to cough up the $99 to get a Mac Developer Account just for the current Developer Preview access, Apple provides all users with a third option; joining the official OS X public beta program.
The OS X Yosemite beta program is limited to the first one million users who sign up, so if you have any interest in trying out the latest OS X version before everyone else and, perhaps more importantly, offering your own feedback of the beta release before things get finalized, now is the time to join.
Requirements to be a beta tester are simple and straight forward, you’ll need a Yosemite compatible Mac with OS X Mavericks, to sign up with your Apple ID, agree to a simple EULA and confidentiality agreement, and then wait until the first Yosemite beta is released to the Beta Program in the near future.
If you do sign up to beta test OS X 10.10, be sure you back up your Mac before installing the beta software. Apple specifically recommends installing the Yosemite beta on a secondary Mac, but another option is to install the beta version of OS X Yosemite on a separate partition to keep your primary OS X volume safely preserved from potential errors and bugs. It’s a good idea to review Apple’s Beta Program FAQ beforehand as well.
The beta seed program was first announced earlier in the year, prior to the announcement of OS X Yosemite.