I installed Windows 10 using boot camp on a separate drive. Now I can't boot in my regular Mac OS now, even when I use the option key at startup. It's booting straight into Windows 10. It's also not resetting PRam or SMC.

Posted on Nov 30, 2019 10:24 PM

7 replies

Phenomenon2020 Author

Level 1 (8 points)

Dec 1, 2019 2:12 PM in response to BDAqua

I was able to reset this time using the original Mac keyboard. Thanks so much for your help.

BDAqua

Level 10 (251,965 points)

Dec 1, 2019 2:10 PM in response to Phenomenon2020

If neither of these work perhaps the Internal Drive chose this time to die???

Have you done a PRAM reset, CMD+Option+p+r...

http://support.apple.com/kb/HT1379

In fact, do 3 in a row, takes a bit of time.

Intel-based Macs: Resetting the System Management Controller (SMC)...

http://support.apple.com/kb/HT3964

BDAqua

Level 10 (251,965 points)

Dec 1, 2019 7:26 AM in response to Phenomenon2020

Does it boot to the Restore Partition with CMD+r keys?

Phenomenon2020 Author

Level 1 (8 points)

Dec 1, 2019 9:27 AM in response to BDAqua

No it doesn’t

BDAqua

Level 10 (251,965 points)

Dec 1, 2019 3:00 PM in response to Phenomenon2020

OK, does MacOS now boot?

Phenomenon2020 Author

Level 1 (8 points)

Dec 1, 2019 4:56 PM in response to BDAqua

Yes!

BDAqua

Level 10 (251,965 points)

Dec 2, 2019 6:37 AM in response to Phenomenon2020

Super, great to hear! :)

Originally posted at discussions.apple.com/thread/250904796