Hi there. My friend has a 2012 MacBook Pro that they complained about being really slow. So I told them to buy an SSD and I'd swap out the drive and install the latest Mac OS. However, trouble began when I realized the Mac seems to be firmware locked. It will ONLY let me boot into the original drive and original OS. It will not let me boot into recovery or boot from another drive. It gives me this grey padlock symbol. I have tried every tutorial out there for trying to reset and it and nothing works. She has no clue what the password would be as she doesn't recall creating one. I read you can call Apple and they can reset it but they require proof of purchase but it's a 6 year old laptop and my friend doesn't have the receipt. This is super frustrating because I thought this was going to be simple and I don't know what to do. Any help would be appreciated. Thanks!