I having an issue no one has been able to fix.
Can anyone help me.
I having an issue no one has been able to fix. I have a 15” MacBook Pro retina (A1398) with the speakers on top next to the keys. it’s a 2nd hand laptop.
I changed the SSD on the inside and I need to install the macOS onto it. I have installed the OS onto it from another laptop using external USB.
I know the SSD works because it boots up just fine when I boot from USB on another laptop but it will not boot on this system probably because it didn’t install from this system it doesnt have the neccessary software/files or whatever to boot.
I can’t get into any recovery option at all and when I boot from USB it just goes 75 maybe 80 percent of the way and the screen goes black but it doesn’t turn off because if I press the caps lock key the light comes on and the light on the USB is still flashing.
Please help if you can. I do not know the OS that was on her before but I can only guess it was Sierra or High Sierra since its a slightly older MacBook.
I hope I have given you enough info.