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Screen brightness broken (Sierra 10.12.4 beta 3)
- Thread starter Kaardan
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- beta 3 brightness macos sierra
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Any luck if you try to do it from System Preferences under Display?
It seems to be working fine for me on the same beta.
Nope. Yesterday I spoke with Apple Support. They recommend me fresh install. That's all Today I created a back up and after work try to fresh install. I reply here if this helped me.
I had same issue - macbook 10,1
@Kaardan can you please give some feedback after install? They where recommend me same step =\
Last edited:
So guys one more moment... I did fresh install 10.12.3 and brightness controller work perfect, after I download update to 10.12.4 MAS. So, what did you think? Right - brightness broke. Let's try fresh install of 10.12.4 eta 40 minutes. I really mad now.
[doublepost=1490824449][/doublepost]So. Fresh install 10.12.4 - brightness not work. Now I even don't have a word.
[doublepost=1490824449][/doublepost]So. Fresh install 10.12.4 - brightness not work. Now I even don't have a word.
Update: I spoke with Apple Support one more time. Capture and send them all data and screens... SO
"It appears to be a software issue, with the way we isolated it, if it's a bug it's something that could be fixed in an update but there's still a chance of a setting causing it that can be changed.
Yes, I will keep in contact, I will be the first ot know of changes or responses from engineering. Apologies for the response time, i'm writing up all the details, every little thing you tried and tested has to be detailed exactly."
For now use 10.12.3. That's all guys. Stay frosty.
"It appears to be a software issue, with the way we isolated it, if it's a bug it's something that could be fixed in an update but there's still a chance of a setting causing it that can be changed.
Yes, I will keep in contact, I will be the first ot know of changes or responses from engineering. Apologies for the response time, i'm writing up all the details, every little thing you tried and tested has to be detailed exactly."
For now use 10.12.3. That's all guys. Stay frosty.
Looks like my EDID doesn't recognised anymore 
ioreg -l -x -w0 | grep DisplayProductID
| | | | "DisplayProductID" = 0x717
ioreg -l -x -w0 | grep DisplayVendorID
| | | | "DisplayVendorID" = 0x756e6b6e
ioreg -l -x -w0 | grep IODisplayPrefsKey
| | | | "IODisplayPrefsKey" = "Alias:0/AppleBacklightDisplay-756e6b6e-717"
ioreg -lw0 | grep IODisplayEDID
| | | | "IODisplayEDID" = <00ffffffffffff00000000000000000000000104a5211578026fb1a7554c9e250c505400000001010101010101010101010101010101ef8340a0b0083470302036004bcf1000001a000000fc00436f6c6f72204c43440a20202000000010000000000000000000000000000000000010000000000000000000000000000000d1>
| | | | "DisplayProductID" = 0x717
ioreg -l -x -w0 | grep DisplayVendorID
| | | | "DisplayVendorID" = 0x756e6b6e
ioreg -l -x -w0 | grep IODisplayPrefsKey
| | | | "IODisplayPrefsKey" = "Alias:0/AppleBacklightDisplay-756e6b6e-717"
ioreg -lw0 | grep IODisplayEDID
| | | | "IODisplayEDID" = <00ffffffffffff00000000000000000000000104a5211578026fb1a7554c9e250c505400000001010101010101010101010101010101ef8340a0b0083470302036004bcf1000001a000000fc00436f6c6f72204c43440a20202000000010000000000000000000000000000000000010000000000000000000000000000000d1>
can you please share your AppleBacklightExpert.kext from `/System/Library/Extensions/`
it's exactly what I need!
Looks like they update this kext in x.4, it's my last chance
Hey @Kaardan, @idoo, if you hop over to macOS 10.12 Sierra Unsupported Macs Thread and check this post -- we're trying to solve the same issue. Since you have Ambient Light Sensors, you could try this. I have a very old Macbook, so I'm stuck with using http://bergdesign.com/brightness/ or going back to 10.12.3.
Nice ti
ps, but as I understood you're trying to solve keyboard brightness, but we're talking about screen