I don't know if this will work for you the same way it worked for me, since my Mac is slightly older and probably different (Macbook Air 2014, 2. It runs considerably faster, probably because it uses Gambatte (which also runs surprisingly well as a standalone) FCEUX is an all-encompassing FCEU emulator. Third one is OpenEmu, running under the main user. FCEUX is a cross platform, NTSC and PAL Famicom/NES emulator that is an evolution of the original FCE Ultra emulator. Wineloader's CPU usage is pretty low (although it does fluctuate up and down but it never goes past 8%) The second one is BGB running under Wine in a secondary user account. The process 'wineloader' s CPU usage is unreasonably high. The first one is BGB running under Wine in the main user account. I fixed the problem (i think) using this method Maybe check how much memory is used during a lag spike, check which unnecessary processes are being used, and use Terminal to stop them.ĮDIT: I suggest you can try running BGB/Wine as a secondary user.

Hm, have you tried a different emulator, maybe? OpenEmu is native to Mac and it's very good, you should check it out: īut other than that, wow.