Mine is a 840 G5, not 830. Earlier in this thread I have posted PR files that you may take a look. The trackpad works, the cursor is a little jumpy sometimes, but overall its fine.
Did you get sound working?
Try switching to i2c branch and use elitebook G4 files. I have an elite book G5 on 10.14.2 and camera, audio and trackpad are working fine. I have some posts earlier in this thread with PR files that you may want to check.
The only flawlessly working osx laptops are MacBooks. I have been using elitebooks as hackintoshs for some time, and thanks to this rehabman guide, theyre very reliable. Recently I have an elitebook g5 which isnt officialy supported, but works well (no sd card, no finger print). I also have an...