Apple MacBook Pro 15" retina display 16 GB Ram 2.6 GHz Intel quad-core Intel Core i7 1TB SATA solid state HD Late 2013 model Full specs here: https://support.apple.com/kb/sp690?locale=en_US The hard drive has been erased and a fresh copy of MacOS Big Sur has been installed (by the techs at the Apple store on Nov 16. I brought it in because I ran into a network error when I was installing the new OS and wanted the Apple techs to do it instead.) The guy at the Apple store said he'd never...