iMac with bootcamp only starts 10 W

I used Bootcamp to install W 10 on my iMac (El Capitan, 2012)

It worked correctly, although I didn't see the icon in the bar of sys Windows Bootcamp.

Until recently, I could change the OS by pressing the 'Option' key at the start of the IMac.

But know, he does not react to any key during startup.

It's always starting at W 10.

In Windows, I can / t see the OS x disc in Windows Explorer.

So, it seems that Windows has changed the MBR by disabling all the options of OS - x.

How can I solve this?

Can you post the output of the following Terminal commands?

diskutil list

Cs diskutil list

sudo TPG - vv - r see the/dev/disk0

sudo fdisk/dev/disk0

The "sudo" commands will prompt to enter your password, and there do not appear to come back. You can also see caution against improper use 'sudo' and the potential loss of data due to an "abuse" of the order.

Tags: Windows Software

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