How can I delete a partition on a Mac Mini (end of 2012)

Hello

I would like to know how I could erase a partition I did by mistake. My Mac is very low in memory and, of course, I as soon as I open some applications Mac starts to bug... I just did an installation fee and it's still going slowly...

When I try to do it with disk utility, it is impossible. I have a screen shot so that you could understand my problem more...

OS X is installed on Macintosh HD, it is the general principle.

I use a Mac Mini Server (end 2012) - processor: 2.3 GHz Intel Core i7 - memory 4 GB with OS X El Capitan

In advance, thank's a lot

MIKE

How do yo start to access disk utility?

You can not erase/format the partition that you started from.

I can't tell if you're trying to do.

Try to start Recovery

Tags: Mac

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