So, I thought I'd take a look at the new Windows 10 preview using Bootcamp. Did everything it told me to, it goes smoothly until the end when when the Windows 10 installer says it can't update the boot configuration. Oh well, I thought, it was just for a bit of fun... I restart the Mac and get the regular chime but, instead of booting, it goes into a loop of small chimes and does nothing. CMD-R time... Internet Recovery, yay! (Sarcasm) So there I am, clenching, as I don't want the hassle of transferring everything over and starting again from a back up. Luckily, Internet Recovery leads to OS X Utilities where I run Repair Disk on the SSD and Macintosh HD successfully. I can't remember if Repair Permissions should have been available on Macintosh HD but it wasn't. Oh, and I made sure to delete the partition that Bootcamp created just in case Anyhoo, I clicked on Restart and manually selected 10.10.1. And... I think all is good again. Although, I'm now going to go hunting for the 5Gb or so it downloaded for the extra Windows files It was supposed to be a simple bit of fun... It wasn't. ---------- Just realised that I've posted this in Mac Pro instead MBP thread. I've reposted it there.