VirtualBox is another Windows emulator for Mac but unlike Parallels and VMware, it’s open source software and completely free.GBA Emulator for Mac OS X Overview VBA-M is a fork from the now inactive VisualBoy Advance project, with goals to improve the capatibility and features of the emulator.
Besides, VGS allows you to play most PS games. Apart from enabling you to run PlayStation games in your windows or Mac PC, VGS emulator library features many good games. Initially, VGS emulator was made for Mac, but it was later updated to accommodate windows PC. Connectix is the developer of VGS emulator. GBA Emulation on mobile devices became so much popular these days, imagine it is like you are holding a real Game Boy Advance gaming.
There are plenty of cool GBA emulators for Mac OS users and here are some of those OpenEmu Boycott Advance 0.4.0 mGBA 0.5.0 Visual Boy Advance M 0.1 GBA Emulators for Android.