On 16/2/2018 Garlicoin changed algorithms from Scrypt Adaptive-N to Allium, so this tutorial is out of date for GRLC mining, however you can use MacMiner for CPU mining Garlicoin if you set it up for Allium instead of Scrypt Adaptive-N

MacMiner supports CPU and GPU mining Scrypt Adaptive-N - This post is a quick and easy tutorial on getting it set up.