Could not open Start up manager

I'm continuing Macbook Pro 13 "Retina early 2015 and I can't open boot with the option key during startup key Manager to select the startup disk.

It used to work well during the first few months, but now stop working.

I have reset PRAM and SMC, but it did not help to solve the problem.

Can you please tell how can I do?

Thank you

You try to access recovery options or another system installed on the drive? Pressing CMD + R will start everything right to recover. You can always choose which system to boot in system preferences > startup disk. Did you run disk utility to check for errors as well?

Tags: Notebooks

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