Security News > 2020 > October > Mac users unable to print after Apple revoked HP certificate
Apple macOS X users with HP printers are left unable to print from their computers after Apple revoked a certificate that signed HP's print drivers.
As observed by BleepingComputer, when printing a document from a MacBook running macOS Catalina and Mojave users with HP printers.
The issue stems from Apple having recently revoked the digital certificate installed on HP's printers via XProtect.
In Apple's case, revoking HP's certificates without a heads up left very many users without a means to print and having to deal with confusing "Malware" alerts.
Apple reached out to BleepingComputer to clarify that the revoked certificates were an action undertaken by HP:. "We unintentionally revoked credentials on some older versions of Mac drivers. This caused a temporary disruption for those customers and we are working with Apple to restore the drivers. In the meantime, we recommend users experiencing this problem to uninstall the HP driver and use the native AirPrint driver to print to their printer," said HP..