I have an early 2015 13in Retina display MacBook Pro (A1502) that I purchased from Goodwill. It did not have a hard drive. I have one on the way, but it's not Apple OEM so I know the MBP will not recognize it without the firmware update required by High Sierra. I've been running the MBP from Sierra installed on a 1TB external hard drive.
Is there any way to get the MBP to update the firmware while I'm running the OS from the external hard drive? Without it the SSD I ordered is pretty much useless. I've tried updating the external hard to High Sierra but no luck. Any suggestions?
Is there any way to get the MBP to update the firmware while I'm running the OS from the external hard drive? Without it the SSD I ordered is pretty much useless. I've tried updating the external hard to High Sierra but no luck. Any suggestions?