Some issues I've come across across after reverting back to Mavericks: 1. Once you update to Yosemite Beta, your iCloud Drive is activated, which is not compatible with iCloud.com. As a result, I've lost all of my Pages documents stored on iCloud (hopefully I will get them back if I reinstall Yosemite at a later date). 2. My computer no longer auto connects to a wireless network when it wakes from sleep or restarts. 3. The app store (and specifically software updates) will not load. 4. My user account on my Mac was switched from an admin to a standard account (fixed through the terminal, logged in as root). If anyone has suggestions on how to resolve any of these issues, I would appreciate it. Here's one person who learned the hard way not to install a beta OS on your main computer's main partition.