Specifics of refurbishment process
I am looking to purchase a refurbished iMac. Before I do, I would like to know what the refurbishment process performed at Apple entails ( i.e. when the process is described as "rigorous" on the Apple Certified Refurbishment webpage, or "undergoes full functionality testing and any defective modules identified in testing are replaced", to what depth is this done? )? That is, if the previous owner had malicious intent, and had installed a backdoor into the refurbished device, at what level ( software, firmware, hardware ) might this implant this be discovered by your refurbishment process ( or, at what level would this be infeasible )? Specifically, are your products checked for malicious hardware implants, and if so, how ( i.e. do you verify that there are no “unknown” components inside the system, and if so, how? )? Is the firmware of each component in the system extracted and verified or a checksum performed with the OEM firmware, or re-flashed if not ( e.g. modifications to EEPROM, JTAG checks, etc. )? Is the BIOS/UEFI ROM, or any other part of the system checked for rootkits ( e.g. the Recovery HD volume, or any partitions of the storage )? Are there any other malware tests performed throughout your refurbishment process that would lead to the discovery and removal of any implants, and if so, what are they? Thank you for your time.