I have a 13-inch Macbook Pro from late 2011 and recently upgraded it to macOS Mojave using this patcher tool: http://dosdude1.com/mojave/. It has some preinstalled kext files that make the Mac work properly, but not everything works perfectly.
One of the main problems is that the built-in speakers are not being discovered by the computer. I tried plugging in headphones, but that didn't work either. I did a bit of research and found a kext file that might do the job, but I would need to find what audio chip the Mac uses.
If anyone knows what chipset the 2011 Macbook Pro has, or know another way to fix this issue, please let me know! Thanks!
Best Answer
The first thing you can try is doing a Reset SMC.