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Dual Boot Yosemite
July 28, 2014 - Dave Hecei
Last week, Apple released the public beta of their next Mac OS, OS X 10.10 Yosemite. While I don’t recommend using a beta OS on any computer that you need to use for day-to-day computing and especially not on any computer in a production environment. What I’m trying to say is that beta software is for testing purposes only, DO NOT use it thinking you’ll get work done on time, if at all. I installed it on my Mac mini this weekend – here’s how I did it.
Back during the 2014 WWDC event, Apple announced Yosemite. While Apple makes beta versions available to Mac developers, this time they announced they would make it available to the public. To get the beta you needed to sign up on the Apple web site. Supposedly, the first million would get the beta when it became available.
The way I installed the Yosemite beta is probably not the best way, but it was a way that allowed me to keep all my data and Apps intact. I started out with a current model Mac mini (2.5Ghz i5) and a USB 3.0 external portable hard drive. First, I used Carbon Copy Cloner (CCC) to duplicate my internal 500GB hard drive to the external. CCC can make a bootable backup of any Mac drive. Since it’s a USB 3.0 drive it actually boots very fast, pretty much just like the internal drive.
Next I went into the System Preferences and chose the Startup icon. Here I set the external drive as the boot drive and restarted. Booting from the copy of my main drive allows me to install the OS X beta while keeping my original install safe.
My mini was running OS 10.8, Mountain Lion so I first opened the Mac App Store and upgraded to OS X 10.9 Mavericks. After Mavericks installed, I then downloaded and installed Yosemite.
After all this work (which wasn’t hard – just time consuming) I ended up with a dual boot system that allows me to choose either OS X 10.8 or the new 10.10. While I had no problems installing 10.10, there were a few things that also had to happen. Lots of updates were necessary and there are still a few Apps that still don’t work. I’m sure that this will be fixed over the next few months since Yosemite is scheduled for release this fall. It should be released at the end of September or beginning of October.
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