Comment 29 for bug 817017

Yes, it is. But you will have to "rebless" it. (Set it as default, otherwise, it will still be installed, but grub will load automatically instead)

To do this, boot on OSX and set refind as default again. I usually run the install.sh script after that, but you can try something like:
sudo bless --setBoot --folder /efi/refind --file /efi/refind/refind_x64.efi
(More info here: http://www.rodsbooks.com/refind/installing.html)