I have a MBP with Yosemite (10.10.5 I think). I was trying to install Windows 7 from a USB and cancelled it when it got stuck looking for a driver - I don't have any disk drive and that seemed to confuse it; there didn't seem to be an option to go back or cancel so I think I just powered down by holding down the power button.

Now when I try to startup it seems to be stuck in Windows mode looking for a bootable device.

Is there a key combination that will make it reset back to starting in Mac OS?


1 Answer 1


To bring up the Startup Manager, press and hold the option key immediately after you turn on your Mac and hear the startup sound.

For additional information see: Startup key combinations for Mac and How to choose a startup disk on your Mac.

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