Macbook pro doesn't boot after iOS upgrade

Hi all,
I've upgraded my macbook pro (was requested automatically the upgrade) and after reboot to finish the installation, my macbook doesn't boot up.
Is there any way to boot it up? A kind of boot in safe mode?
I'm trying to power it up but nothing. It doesn't boot at all.
Please, can you help me with this.
Thanks
Álvaro

iOS is for iPhone, iPad not for Mac. So what upgrade are you referring to?

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