I also had the GRUB error at the end of the Mint 16 install on my macbook pro.
Try this:
(1) Run live session again from mint CD/USB then
(2) Open a new Terminal, then type:
sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get update
Press Enter
(3) Then type:
sudo apt-get install -y boot-repair && (boot-repair &)
Press Enter
(4) Select the recommended fix.
(5) Reboot
(6) Shutdown from ReFind once or twice, although this is probably not necessary…
(7) Boot Mint

from: http://forums.linuxmint.com/viewtopic.php?f=46&t=151386