PhilipC
New member
Have an 820-3437-B here that does not want to boot into MacOS (Flashing folder). So I tried booting into Mojave through USB and still flashes as well but boots into Sierra via USB but the thing is, it also does not want to boot into Sierra via SSD directly (flashing folder). Was liquid damaged but was cleaned (ultrasonic). Tried working SSDs, even installed Sierra on the same model MacBook Air and swapped the SSDs around.