Since installing Beta 7, SystemUIServer crashes repeatedly when enabling the checkbox "Show VPN status in menu bar" in the network settings. This was working fine until Beta 6. If you are (like me) stuck in a SystemUIServer crash loop (which basically means having a flashing menu bar only sporadically showing Wifi, volume etc) and unable to remove the checkbox, I've found a workaround. Open Terminal and enter the following: defaults write com.apple.systemuiserver menuExtras -array "" Then log out and log in again. That's clearly a bug. I've filed radar 22359433.