I'm looking to triple-boot a 2010 MBP with El Capitan, Windows 7, and Linux. The first two are already installed and working fine. From what I understand, the reason I can't just install Linux on another partition is because the MBR/EFI limit is 4 partitions: Disk0 1: EFI 2: El Capitan 3: Recovery 4: Windows Now I may be able to install it by implementing rEFInd, but it seems the method can introduce issues. What I'm wondering is if it would help to remove the "Recovery HD" partition that comes with OSX, freeing up a partition to install Linux onto. I don't really see a need for the recovery partition for recovery, and I don't use any of the features it enables (File Vault or Find my Mac). Thanks!