Stuffed my imac

Hello:

OS High Sierra.

I was formatting my mac hard drive via command R at start up and the mac utilities that show up post boot.
It was on it's second erase pass of 3 when I inadvertently interrupted the power supply.
Now the stupid computer won't reinstall the os.

Any suggestions for a home fix?

If you have access to another Mac you can create a bootable installer on a flash drive. You can Google for instructions. It's pretty straightforward.

Yup, you are probably going to need an external bootable drive. Can be flash or regular HD. Seems like Drive Genius includes a bootable CD, but I'm not sure about that.

Obviously too late for this now, but always create a bootable drive before messing with low level formatting.

What was the reason for formatting?

It might need a new internal HD now, sometimes that kind of failure is fatal.

Thanks guys.

I was cleaning up the system as it was running really slow.
I have a dual back up system so I did not lose any data.

The internal HDD is visible and still has the original partition but it just won't re-install high sierra (or anything)

fordmondeo wrote in post #18482123
Thanks guys.

I was cleaning up the system as it was running really slow.
I have a dual back up system so I did not lose any data.

The internal HDD is visible and still has the original partition but it just won't re-install high sierra (or anything)

So you are booted from an external drive?

Have you launched/run the included Mac Drive Utilities?

Left Handed Brisket wrote in post #18482128
So you are booted from an external drive?

Have you launched/run the included Mac Drive Utilities?

Next thing on my list.
It only finished installing on the external drive 5 minutes before I left for work.

fordmondeo wrote in post #18482123
Thanks guys.

I was cleaning up the system as it was running really slow.
I have a dual back up system so I did not lose any data.

The internal HDD is visible and still has the original partition but it just won't re-install high sierra (or anything)

If you've booted from one of your backups, I'd reinitialize the internal drive with Disk Utility, then use Carbon Copy Cloner to clone the backup to the internal drive.

YAY! Sorted. Thanks all.