Yep. Support for the M527 and M577 just happened about a week ago (New HP devices are supported! LaserJet M527 and M577 software_update imfp hp hewlett_packard ).
If you're trying to push via WJA, there's an easy way to make it happen for you:
- Navigate to the folder containing you Application Depot files for FutureSmart (4.2.5).
- Copy one of the existing folders that's in there and paste it in place. This makes a Copy of the folder.
- Rename it to be the same name you see the device through WJA. It may be "HP LaserJet MFP M577" or something similar.
- Attempt to push to the device.
Push it to a sample device and test for awhile. You should be OK.