Lost-Entrepreneur439 Posted May 25, 2023 Share Posted May 25, 2023 I have a Dell Latitude E6430 on Catalina, and the brightness keys should be Fn+Up arrow to make the screen brighter, and Fn+Down arrow to make the screen darker, however instead it's Fn+Insert to make the screen brighter, and Fn+F3 to make the screen darker. I also had the same issue when I was using Big Sur (I downgraded to Catalina due to poor performance in Big Sur). EFI is attached, specs in signature. EFI - https://files.catbox.moe/sati71.zip Link to comment Share on other sites More sharing options...
Administrators Hervé Posted May 25, 2023 Administrators Share Posted May 25, 2023 We have and old dedicated guide for brightness keys on these Latitude models. Look it up in our Technical Info->DSDT/SSDT forum section. It's got nothing to do with he version of macOS, it's an ACPI matter. Do think of using the forum Search facility before posting, you'd have found it with a simple search on "brightness keys"... Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted May 25, 2023 Moderators Share Posted May 25, 2023 See here Link to comment Share on other sites More sharing options...
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