Triple boot
I’ve been installing and re-installing all three systems on my iMac since I got it. I must say that with two partition schemes (GPT and MBR), it is easy to get things wrong. Rules of thumb:
1. There are 4 primary partitions available (NO EXTENDED ON GPT!!). First one is reserved for mac, so we have one primary for each system.
2. Make your partition table look like: Mac + Linux + Windows. Bootcamp expects Windows to be the last partition on the disk, so if that’s not the case, Windows cannot be installed. (hence, no data partition whatsoever. Also, Mac+Windows+Linux doesn’t work.)
3. Unless you have a tiny hard disk, do not try to clean up the 128MB empty space left by diskutils. IT MAY NOT BE EMPTY SPACE! (I tried to clean up all the empty spaces using gparted in Ubuntu and ended up losing my Windows bootloader…)
4. Some guides say that there cannot be a swap for linux (same reason as 3). This is not quite true. I successfully installed Ubuntu with swap. It was treated as logical partition somehow. I could be wrong; the partition table could have been messed up already. (NOTE: If you do create a swap, it is very likely that windows recovery mode wouldn’t be able to see windows partition again! It somehow sees all the partitions up to swap, which is ..4 partitions…. That’s what happened to me - no bootloader, couldn’t recover.)
And I’m re-installing MacOS agian.
