Downgrading the HP OfficeJet Pro 8620 is a hack, not a feature. For the technically inclined user who saved an old firmware file, it can restore functionality and choice. For everyone else, the process carries real risk of turning a functional printer into a paperweight.
A: Indirectly—by running Windows via Boot Camp or a virtual machine (Parallels/VMware). The USB pass-through must be perfect. Most users find it easier to borrow a Windows PC. hp officejet pro 8620 firmware downgrade
HP generally prevents downgrading to older firmware versions for “security and performance improvements.” However, a few methods have been documented by the user community. Downgrading the HP OfficeJet Pro 8620 is a