Whew... I have an old MacBook Pro 4,1 running OS 10.6.8 that I'd like to erase the HD and install 10.11.6, the highest OS that will run on that machine - then this laptop is being given away.
My laptop is a MacBook Pro 11,2 running OS 10.13.6.
How, pray tell, do I create a bootable USB stick so I can install 10.11.6 on the 4,1? The various videos online that I viewed are... a tad unclear to this poor soul.
MacBook Pro 15", macOS 10.13
I feel like I'm getting closer... but still no cigar. Ugh. When I plugged in the following in the Terminal window, this is what I got:
sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/OSX --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app
Ready to start.
To continue we need to erase the disk at /Volumes/OSX.
If you wish to continue type (Y) then press return: y
Failed to start erase of disk due to error (-9999, 0).
A error occurred erasing the disk.
This was quite the process, but I did it. Not very scientific, but I think the issue was 10.6.8 and using that version of Disk Utility?
I updated the MacBook Pro with 10.11.6, THEN erased the USB stick, reformatted it. I ran the 10.11.6 Installer again so the Installer would be in the Applications folder, then ran Terminal to make the USB stick bootable. Whew. It worked. I was able to wipe the drive and install a clean version of 10.11.6.
Thanks for your help. Much appreciated.
Hello,
Have you tried fully erasing this USB storage device in Disk Utility prior preparing a bootable installer?
Bootable USB for old MacBook Pro
