Following Apple's release of a public beta of OS X Yosemite, iDB reader Antony Verros sent us some code he wrote in AppleScript, which allows users to quickly restart a computer and automatically boot up in the installed OS of choice. For anyone who installed the OS X Yosemite beta on a separate partition, this is an easy solution for booting up into Yosemite or Mavericks without having to hold down the Option key on boot to select the desired partition. The script can even be tweaked to work with BootCamp.
While it's mostly a matter of time-saving convenience, this method can prove to be quite advantageous over time, particularly for users who find themselves frequently switching between OSs, whether it be a Yosemite beta, Mavericks, or Windows 7. Having an easily accessible application for booting into another OS while making a sandwich or refilling a cup of coffee, versus having to wait around to hold down Option, can be highly useful...