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Hi, I am currently using Big Sur on ProBook 6470b. But all guides for 6470b are outdated. I want to make it as Vanilla as Possible. Everything works except for Tap To Click and Battery. Big Sur has Sealed File system, so I can't really modify SLE or LE. (except for making a Mounted Folder and then blessing it all, but it won't let me refresh the kextcache) WIFI I am using is AR-9285, and it works fine with few kexts installed in OC Sound is VoodooHDA, because AppleALC does not work with any IDT92HD81B1X5 layout id (3, 11, 12, 20, 28) UPD: Applied RehabMan's Layout-3 HDEF Audio patch to my DSDT just to test it, and it worked like a charm with alcid=3 and AppleALC installed I tried HP ProBook Generic Patch from RehabMan Repo, and applied it. Also I installed ACPIBatteryManager.kext from RehabMan bitbucket. But after a restart is shows 1% and that I have to service my laptop battery. Then I start Reading those Notes in the Patch, and it says that I have to use 4530s DSDT Patches for 6x70b laptop. But all Sources for 4530s are dead. What am I suppose to do about this? All i need is the battery. The rest works fine. Attaching OC EFI EFI.zip