Circle with line across instead of Apple logo when booting

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Level 1

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Circle with line across instead of Apple logo when booting

I installed Windows 10 pro with bootcamp on my Macbook Pro w/Retina 13 inch mid 2014 version. I have used the Windows for the whole day and decided to boot osx. But instead of the apple logo, there is a circle with a line through it and it would just boot Windows. How do I fix this problem? I can't boot my mac anymore.

MacBook Pro with Retina display, OS X Yosemite (10.10)

Posted on Aug 18, 2015 9:20 AM

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Answer 1

Loner T

Level 9

59,536 points

Aug 18, 2015 10:14 AM in response to Jisan3369

Was W10 a clean install or an upgrade from a prior Windows version? Please use OS X: Installing OS X on an external volume - Apple Support and boot from this external boot disk and the internal disk can be inspected for issues. A second Mac in Target Disk Mode (Share files between two computers with target disk mode - Apple Support) can also be used.

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