I've got a late 2010 MacBook Air that came with OS X 10.6.6 installed; I have never upgraded it to 10.6.8 Snow Leopard or to 10.7 Lion.
I dual boot with Windows 7 installed using boot camp. I use rEFIt as my boot loader.
Disk Utility in OS X shows:
- Macintosh HD is partition 2
- partition 3 is an empty FAT partition
- Windows HD is partition 4
I don't know why partition 1 doesn't show up there. In Windows under Disk Management it shows up as 200 MB (GPT Protective Partition)
When booting, rEFIt gives me these options:
- Boot to Mac OS X
- Boot to Windows on Partition 4
If I upgrade OS X to Lion, is there any risk of breaking my Windows install, messing up my Windows partition or the boot loader or anything like that?
Best Answer
You won't break Bootcamp by upgrading Mac OS X, but it may complain on attempting the upgrade that it cannot do it. Some configurations of Bootcamp from older macs put the partition for Bootcamp as the 3rd partition on a disk. In these cases, Lion is unable to create a recovery partition at the start of the disk, as the Bootcamp partition won't boot from position 4.
But you can check for this, look in Disk Utility, and if you only have 2 partitions, then you're likely looking peachy :)