iPad Pro 9.7-inch (2016)
iPad Pro 12.9-inch (2015)

iPads:

iPad Pro 1 12,9” A1584 | A1652 - A9X

iPad Pro 1 9.7” A1673 | A1674 | A1675 - A9X

HFZ Ramdisk Universal 3.4 ( mac tool )

Download :
https://mega.nz/folder/JBEQSBaK#P-MMA1LGZergdz2-3vec6A/file/ABEQXD5C

Always check if supported with the app connect and check the compatibility 

Steps :

1- Connet the device to mac and check if supported by the tool, this step is important is required by the software to be able to register SN.

2 - After confirm its supported u can now register Serial 

3 - Boot device and activate 

@appletool if you need help