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High sierra is definetly the best macos for the dell optiplex 380 because of how old the 775 motherboard is, it works up to macos catalina but you will need a metal compatiable gpu and teletrap kext for core 2 duo cpu, also you will need the sata kext i provided in previous post to see your hard...

Also you have to use an app called kext utility to install these kext, do not put them in other folder it wont work, just drag the 8 files in kext utility and let it do its work, restart and see if that works

You have to find out what the device id is for your graphics card it varies as there are any diffrent brands that make the amd radeon hd 5450, mine is sapphire brand and is known to work well with macos with device id 68e4, find your id and change it in the amd5000 kext and x3000 kext and the...

Yes that graphics card should work perfectly

I was using smbios 13,1 to install, after install you can revert back to smbios 10,1 with -no_compat_check boot flag, the kernal panic could be caused by the gpu you have, it works perfectly with my ati radeon hd 5450 in high sierra

These sata files helped me install catalina on my dell optiplex 380 without ahci option, add these files to clover/kext/10.15 folder and you should see your hard drive in the installer now, let me know if this helps you, p.s this does not work with big sur, if you try it you will get a kernal...

High Corona

Yes only the back audio works, if you want to use front and back i suggest you use voodoo version 2.8.5 and remove applehda kext from system/library/extensions folder, it works perfectly but i prefer applealc, glad you got it working, if you need any more help feel free to let me know, cheers!

I had the same issue, make sure to use applealc version 1.4.2 only, add it to others folder where lilu kext is located, i tried the latest version and it didnt work, in boot section add alcid=16, in devices section make sure you change inject from no and switch to 0 and check resethda, thats...

I've upgraded to high sierra with AMD radeon 5450 1gb ddr3, core 2 quad q9400 that shows up as quad core intel xeon, but works without issues using smbios 10.1 just like in sierra, I had to install all AMD related kext from sierra to make the AMD radeon 5450 work in high sierra, once installed...

Nevermind I got it to work! Everything is working now, i got ethernet lan, wifi, qe/ci for graphics, and audio, but the Applealc didnt work for me so i used voodoohda 2.8.5 that i was using in mavericks and worked perfectly, for the graphics i had to change the plist files for these two kext...

Hey i need help bro, my graphics and my sound didnt work in high sierra, did it work for you?