- Joined
- Aug 26, 2015
- Messages
- 90
- Motherboard
- ASUS Strix Z370- Wifi
- CPU
- i9-9900K
- Graphics
- Vega 64
- Mac
- Classic Mac
- Mobile Phone
System Definitions Revisited
All along, I've always preferred using using iMac18,x or iMac19,1 system definitions with IGPU enabled on this hack because of the similarities with CPU and motherboard chipset. I did test the iMacPro1,1 system definition way back when the iMac Pro was first released and, while it worked fine, I ended up going back to iMac18,x.
With the release of macOS 10.14.5, Apple made some changes to how macOS handles GPUs and they improved h.264 and HEVC encoding/decoding handling on iMac Pros. I decided to give the iMacPro1,1 system definition another try. Here's what I found.
View attachment 411331
As you can see, everything is working with iMacPro1,1. There are no compromises. It's only been about two days since I started retesting this system definition, but it has been running great. Until I encounter any issues, I'm going to be sticking with this.
If you plan on keeping this long-term and adding this to the downloadable EFI folders, please update Post#1 with infos on HOW to disable the iGPU.
Please also warn people, that if they change their system definition on a working machine, they will loose their iCloud login and get error messages from apple. And all other Logins and Licenses need to be recovered/transferred as well because they will be logged out/marked invalid for this new machine.
The smoother solution is to Change System Definition, then reboot and instantly install Mac OS, freshly. Then restore from TimeMachineBackup. This will preserve iCloud and most logins. Licences will probably still be needed to be transferred...