If I had had any idea it was going to be this difficult I'm not sure I would have done it. The biggest thing is I didn't use a password to open my iMac. I had no idea how difficult that would be. I took the beautiful machine home and within a couple of hours someone from the store was reinstating Sequoiai. I used to be a computer tech but that was way before I turned 77, had a heart tack, got severe tremors, and other things that went along with that. I have had it up and running for 4 days now and till having trouble with passwords, but so far I've managed to stat out of Activation Lock. It's nice to be back.