Leaderboard

Here is my working EFI OC097 for Latitude 5490 (i5-8350U, Intel Wifi), for Sonoma. Due to file uploading size limitation, AirportItlwm.kext (V1.23 Alpha for Sonoma) is not included. Both HDMI port and Display Port via USB-C port are working. You may give it a try. This EFI was based on this GitHub repository: juanpy0223/Dell-Latitude-5490-8th-gen. My bios is still 1.26 and did not update to the latest (V1.32) since the latest BIOS may prevent the CFG LOCK changing. Also once updated, it can not go back to earlier BIOS. I experienced this with my Latitude 5400. If you are able to disable CFG LOCK with 1.32 BIOS and set DVMT to 64MB (instruction is in the link above), then you can make the following changes to the Config.plist: - Root->Kernel->AppleCpuPmCfgLock = FALSE (for native CPU power management) - Remove the following two properties from your iGPU's DeviceProperties (PciRoot(0x0)/Pci(0x2,0x0) for my case): framebuffer-fbmem framebuffer-stolenmem Goodluck! DELL-5490-OC097.zip