MacBook Pro (Mid 2012)

[Dxhound]

Hi:

I have just purchased a new MacBook Pro and want to prep my old MacBook Pro so I can sell it. I did upgrade the SSD to a Samsung EVO 860 a couple years ago, and this drive has worked perfectly.

However when I go to the MacOS Disk Utility to erase the drive, the process fails. I selected untitled as the name, APFS and GUID Partition Map. It seems to fail when trying to unmount the drive, it says can't open the device.

So I thought of just re-installing Catalina, that went fine but all my old info etc is still present.

Has anyone had a tried and true method of erasing the drive and re-installing a fresh copy of Catalina.

Dxhound

 

[ferrarr]

You need to startup from a different drive, if you need to wipe your internal drive. You can do that by creating a bootable USB installer, https://support.apple.com/en-us/HT201372. You will need a 16GB USB (Flash/Thumb/SD card, etc.) drive to create this.

 

[Dxhound]

You need to startup from a different drive, if you need to wipe your internal drive. You can do that by creating a bootable USB installer, https://support.apple.com/en-us/HT201372. You will need a 16GB USB (Flash/Thumb/SD card, etc.) drive to create this.

Thanks Bob

Downloading Catalina right now, just looking for my 16Gb Thumbdrive.

 

[IWT]

Have a look at https://support.apple.com/en-us/HT201065

This is what you need to do before passing on or selling.

Ian

 

[Dxhound]

Have a look at https://support.apple.com/en-us/HT201065

This is what you need to do before passing on or selling.

Ian

Ian:

I know what is required to do as per Apples instructions, that was not the problem. I think I have the problem licked, will know in 10 minutes. Thanks.

 

[Dxhound]

Thanks Bob

Downloading Catalina right now, just looking for my 16Gb Thumbdrive.

Hi Bob:

Everything worked like a charm. Thanks for all the good info.