I've installed BigSur successfully on my laptop dell 3442 A-15 with opencore following dortania's Haswell guide (first time trying opencore, before I did it on Catalina with clover and it works).
There are some problems and I would like some help to solve...
Working:
- trackpad, intel graphics 4400 and only 1/3 USB port
Don't working:
- laptop keyboard, Bluetooth, WiFi, network connection via cable, sound, 2/3 USB ports (I didn't made USB mapping yet)
I tried olaria premade EFI for Haswell, but the only thing that works is the 3/3 USB ports. Link: https://tinyurl.com/36pjy29u
My EFI: https://mega.nz/file/rDo1zapT#gwd6C1h3M3p67Y7rnlTZ2QryY0ntsr__XxCK3o7-05g
Here Working: Keyboard, trackpad, network connection via cable, 3/3 USB Not Working: Wifi (I followed this guide and tried the first 2 options), bluetooth, sound(tried all codecs numbers for my sound card ALC255 here)