How to uninstall rEFInd (0.8.2) on Yosemite I'd like to remove rEFInd, since my laptop doesn't wake up from suspension (provided that the laptop is only powered by battery) anymore eversince I installed it (in neither of the operating systems: Mac OS and Ubuntu).

Assuming one has installed rEFInd on the main hard drive, then according to rEFInd's page it should be enough to remove (important: also empty the trash) the following folder:

/EFI/refind


http://www.rodsbooks.com/refind/installing.html#uninstalling

Indeed my blessed folder is that one:

Mac:~ user$ bless --info
finderinfo[0]: XXXXXXXX =&gt; Blessed System Folder is /EFI/refind
finderinfo[1]: XXXXXXXX =&gt; Blessed System File is /EFI/refind/refind_x64.efi
finderinfo[2]:      0 =&gt; Open-folder linked list empty
finderinfo[3]:      0 =&gt; No alternate OS blessed file/folder
finderinfo[4]:      0 =&gt; Unused field unset
finderinfo[5]: XXXXXXXX =&gt; OS X blessed folder is /EFI/refind
64-bit VSDB volume id:  0xXXXXXXXXXXXXXXXXXXXX
Mac:~ user$ bless --info --getBoot
/dev/disk0s2


Now my question is, do I have to remove just the refind folder, or also the EFI folder? Since my EFI folder also contains a tools folder. Here's the entire folder tree:

EFI
   - refind
       - icons
       - keys
       - refind_x64.efi
       - refind.conf
   - tools
       - gptsync_x63.efi
The gptsync_x64.efi program file was probably installed with rEFInd, but is a separate program. Leaving it in place should do no harm, but will also probably do no good, so it's a judgment call on your part. If you remove rEFInd, chances are the only thing that would run gptsync_x64.efi would be a subsequent install of rEFInd (or of its predecessor, rEFIt) or launching it manually from an EFI shell.