Deleted Drive

Thanks for your reply. I followed the link to the article which was helpful although am still struggling since when I erase Macintosh HD, there doesn't seem to be an option to format it as Mac OS Extended, only different types of APFS. I have also tried erasing the Apple SSD disk rather Macintosh HD and formatting as Mac OS Extended (Journaled) and it says that the 'Erase process has failed'. Not sure if you have any suggestions for how I can get round this so I can install High Sierra/turn the laptop on again.

Have put photos in below if that helps.

Thanks.

Hi, I have tried removing the Macintosh HD volume by clicking the Delete volume button although it is showing as deleting failed (shown in picture).

Also, do I need the data volume? I think this may have been what I deleted before?

Thanks so much.

Thanks, have just tried this and on Macintosh HD it says 'First Aid could not unmount the volume for repair'.

Yes that's right

It works on the top level but am getting the same error message when running it on the Container disk 1 and Macintosh HD .

It is an early 2015

I will do that - many thanks for all your help though.