I installed mine, but the ssd I'm using was a bootable usb running Yosemite, and now that I plugged it in, I'm getting a circle with the slash through it when I try to boot to it, and I can't unmount it or reformat it from the recovery Disk Utility or in Mountain Lion on the stock hdd still inside.
Did you ever find a solution?
I installed mine, but the ssd I'm using was a bootable usb running Yosemite, and now that I plugged it in, I'm getting a circle with the slash through it when I try to boot to it, and I can't unmount it or reformat it from the recovery Disk Utility or in Mountain Lion on the stock hdd still inside.