I wanted to thank you for your work on the G5 5587, I own two of these and was able to successfully install Mojave and update to latest, 10.14.6 with your files. I upgraded the internal wifi cards on these from the Intel to Dell DW1830's. (Had to modify the laptop case by cutting a little of the plastic where the card and SSD is to fit the slightly wider 1830 and had to install a 3rd antenna) but all is working great EXCEPT the Nvidia GTX 1060.
On a special note about installing a 3rd antenna, I tried the simple just running the 3rd antenna running it through the bottom of the case, BUT, it made it where the card would only connect at around 300 mps. I had to disassemble the lcd bezel to run them the correct way and I now connect at a rock solid 1000mps and sometimes swings to 1200mps.