cannot upgrade to current Mac OS

ducdinh512 wrote:

So go get an apple disk, install Monterrey on that disk, reinstall monterrey from that disk, and then upgrade...is that correct?

From the information presented in this forum you have to:

1. Take out exist non-Apple disk and replace it with the Apple disk.
2. Install Monterey on the non internal Apple disk
3. Put the non-Apple disk back inside and update that to Monterey like you were trying.

To install Monterey on the Apple disk I recommend that you make a bootable USB install media with Monterey on it using Apple's instructions

How to create a bootable installer for macOS - Apple Support

You have to do that before you put the Apple disk inside.

What happens when you try? Error mesage?

Do you have enough free disk space?

If upgrading from macOS Sierra or later, your Mac needs 26GB of available storage to upgrade. If upgrading from an earlier release, your Mac needs up to 44GB of available storage.

Also uninstall any antivirus and "cleaning" apps before trying installing again.

Further, you need an Apple disk installed to upgrade to Monterey since the upgrade includes an update to the Mac's firmware. That update looks for an Apple disk and write to the dick to do the firmware update. The install will terminate or freeze if no Apple disk.

You need to find an Apple disk and install it and install Monterey on that disk. Then you can reinstall you present disk and upgrade that to Monterey.

You can try Googling for an Apple disk. Just make sure it is an Apple disk.

What happened to your original Apple disk?