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Dell Latitude 7490: building OpenCore EFI for Big Sur


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3 hours ago, lamatta17 said:

Hello Baio77,
Thank you very much for your support.

Have now tried the following:

1. BIOS settings like: https://osxlatitude.com/forums/topic/11477-7490-bios-settings/?tab=comments#comment-90318
2. copied your EFI folder to internal SSD.
3. started
4. nvreset
5. started

Result: no sound, no touchpad, no sleep, no Thunderbolt

started another time with nvram-reset no success.

Does it make sense to do a complete reinstall with your EFI?


here still the ioreg with your EFI

MacBook Pro von Birne-Bajo77.ioreg 5 MB · 1 download

Ok ioreg says that GPI0 is NOT active so no working trackpad, you have to extract ACPI from Bios via EFI Debug OC, I leave it here, put it in USB and start os already installed, after all the verbose, you pass me the extracted files SysReport and the log file 

EFI Debug 0.7.1.zip

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Hello Jake Lo,
I have tested your EFI.
Result:
- Sound and microphone work.
- Camera works
- Trackpad works, but pointer is very slow despite max pointer speed.
- The touchpad buttons do not respond (all 4).
- Sleep mode works.
- Volume control works with F2, F3 and F4.
- Brightness cannot be controlled with (Fn) F11 and (Fn) F12
- Thunderbolt is not present

 

Thanks for your efforts

Hello Baio77,
have generated the data with your Debug-EFI.
Thanks for your time.

SysReport.zip

I have tested a little further.
a monitor connected to HDMI is not recognized.

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Hi,
have connected the HDMI monitor.
changed the value and restarted.
HDMI monitor remained dark.
Unplugged HDMI connector and plugged it back in.
Shortly after that the picture was there.
Funzt (is german for works)

many many thanks

now only Thunderbolt and the trackpad is missing, then I am happy
 

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check out Hervé's guide, he also mentioned that trackpoint and mouse keys are not working. You can use tab to drag or 2 fingers to right click.

There's really no good support to Alps I2C touchpad, only some basic movement.

The USB-C port should work with external display though ... usb-c to DP port, but not much support there for thunderbolt.

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