How to Fix Changing DVMT pre-allocated using the RU.efi, expert advice needed
Network issues on Hackintosh or unsupported Macs are typically caused by chipset incompatibility, incorrect kext pairing, or corrupted network preferences.
Quick Fix Steps
- Identify your network chipset: Open System Information > Wi-Fi/Bluetooth or use Hackintool.
- Use the correct kext: For Intel Wi-Fi use AirportItlwm, for Broadcom use BrcmPatchRAM, for Ethernet use IntelMausi or RealtekRTL8111.
- Reset network preferences: Delete /Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist and reboot.
- Check privacy settings: System Settings > Privacy > Location Services must be enabled.
Verification
- Wi-Fi connects after reboot.
- Bluetooth pairs and stays connected.
- Location Services works in Maps.
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Original Question: "Changing DVMT pre-allocated using the RU.efi, expert advice needed"
So I saw the method on how to unlock the CFG lock [here] (https://www.reddit.com/r/hackintosh/comments/hz2rtm/cfg_lockunlocking_alternative_method/) and successfully did so.
Now the next step: change the DVMT pre-allocated to 64MB.
The problem: the variable for the DVMT might be saved in a different location, and that´s the point where I´m not a 100% sure if my findings are right.
So i extracted my BIOS to a readable .txt format and that is what it says for the DVMT:
0xA2F39 One Of: DVMT Pre-Allocated, VarStoreInfo (VarOffset/VarName): 0xDF, VarStore: 0x2, QuestionId: 0x1DB, Size: 1, Min: 0x0, Max 0xFE, Step: 0x0 {05 91 33 13 46 13 DB 01 02 00 DF 00 10 10 00 FE 00}
0xA2F4A Default: DefaultId: 0x0, Value (Other) {5B 85 00 00 08}
0xA2F4F Value {5A 82}
0xA2F51 QuestionId: 0xB3A equals value in list (0x73, 0x74) {14 8A 3A 0B 02 00 73 00 74 00}
0xA2F5B 64 Bit Unsigned Int: 0x1 {45 0A 01 00 00 00 00 00 00 00}
0xA2F65 64 Bit Unsigned Int: 0x2 {45 0A 02 00 00 00 00 00 00 00}
0xA2F6F Conditional {50 02}
0xA2F71 End {29 02}
0xA2F73 End {29 02}
0xA2F75 End {29 02}
0xA2F77 One Of Option: 0M, Value (8 bit): 0x0 {09 07 34 13 00 00 00}
0xA2F7E One Of Option: 32M, Value (8 bit): 0x1 (default) {09 07 35 13 30 00 01}
0xA2F85 One Of Option: 64M, Value (8 bit): 0x2 {09 07 36 13 00 00 02}
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Notice the VarStore: 0x2 in the first line!
for the CFG lock this value was VarStore: 0x3 which referred to this section: VarStore: VarStoreId: 0x3 [B08F97FF-E6E8-4193-A997-5E9E9B0ADB32], Size: 0x209, Name: CpuSetup and therefore I had to use the "CPUSetup" within the RU.efi tool.
now if I´m right, for the DVMT with a different VarStore I would have to change the variable in a different section of the RU.efi tool: VarStore: VarStoreId: 0x2 [72C5E28C-7783-43A1-8767-FAD73FCCAFA4], Size: 0x1EB, Name: SaSetup
so to conclude: for the DVMT I had to change offset 0xDF within the SaSetup of the RU.efi tool
If anyone here is experienced with this kind of BIOS editing I´d be really happy to get my findings somehow verified.
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