iMac has no space after removing windows disk partition

alcs1120 wrote:

So I've had windows on my 21 inch iMac 2017 since July of 2019 and so far it was good, until I decided to remove the windows partition. When I had removed it, I removed the partition using the button for it in disk utility from the HDD(which is supposed to have 1 TB) and when I had removed the partition for windows, the HDD had only 399 GB on it.

This is not supported. The recommended method is Remove Windows from your Mac using Boot Camp - Apple Support.

https://discussions.apple.com/content/attachment/db1dbb40-f07a-475b-b6e9-ff9c3453950b

When I had run the command "diskutil list" in terminal here's what popped up.

https://discussions.apple.com/content/attachment/4ff51a78-74c1-4887-a293-acf68c4497ef

I am a bit worried since the partition is completely gone and when I restarted the computer it booted into a blue windows error screen.

Do you have a Time Machine backup of macOS? If not, can you create one now?

Excellent.