I have a 2008 which currently I have on 10.9.5 as single boot, although it has had windows 7 dual boot previously. Graphics is a 650 TI these days and I'm happy enough with it. I recently re-installed the HD 2600 that had been a little temperamental previously. It only lasted 20-30 seconds of desktop before locking the machine, so I know know that choosing disk at boot isn't possible with the current setup + working hardware that I have! Is there any reasonable way to triple boot MacOS / Windows 10 or 8.1 / Linux with this setup, or am I inline for a new graphics card to achieve that?