Hey everyone. I formatted my iMac because I couldn't remember my password. I wanted to reinstall it, but the computer can't see the disk. During installation, there is no disk on which I could install the operating system. Using the disk utility, the computer only sees disk images: Apple disk image Media and OS X Base System. What can I do? Please help.
iMac 27″, macOS 12.7
Sounds like the Internal Drive is not formatted correctly.
To re-format an Intel iMac, see > Use Disk Utility to erase an Intel-based Mac - Apple Support
Looks like your internal drive is not being seen. Either that drive has failed, or you are using a third party NVMe SSD...an internal third party NVMe SSD requires using macOS 10.13+.
FYI, the "OS X Base System" image is the virtual volume for the macOS installer. You cannot do anything with the image so ignore it.
Problem with starting the disk.
