Hello, I'm trying to install rEFInd (0.8.6, latest) on my early 2014 macbook air running OS X 10.10.2. The goal is to dual boot kali linux (for learning purposes), which would be installed from an imaged USB. However, when I run install.sh I get this: Code: Installing rEFInd on OS X.... Warning: root device could not be found Installing rEFInd to the partition mounted at /Volumes/ESP Found rEFInd installation in /Volumes/ESP/EFI/BOOT; upgrading it. Copied rEFInd binary files Notice: Backed up existing icons directory as icons-backup. Existing refind.conf file found; copying sample file as refind.conf-sample to avoid overwriting your customizations. WARNING: If you have an Advanced Format disk, *DO NOT* attempt to check the bless status with 'bless --info', since this is known to cause disk corruption on some systems!! Installation has completed successfully. Unmounting install dir umount(/Volumes/ESP): Resource busy -- try 'diskutil unmount' I'm brand new to any kind of "under the hood" computing, this is my first linux install attempt, not super comfortable with terminal, etc so if someone would be kind enough to point me in the right direction n00b style that'd be grrrrreat.