Jake Lo

That's the same as ALC293. Check to make sure you don't have VoodooHDA and the disabler installed. Reboot without cache.

Can you verify what sound card it has? Another member with the same system has ALC293 so I thought it would be the same on yours but perhaps it's not. Download DPCIManager, it should list what sound card you have or you could check the BIOS. Oh, make sure you remove VoodooHDA and AppleHDADisabler and restore the vanilla AppleHDA if you had removed it.

Does it have a PCIe Half Mini Card or a M.2 (NGFF)? See here for list of supported card. If you have the ngff slot, I would suggest a Dell DW1560, you could get this from Dell.

restore AppleHDA vanilla to /S/L/E. Install all the kexts in /Other/LE to /S*/L*/E* with kextwizard and run the permission again.

What kexts do you have on /EFi/Clover/Kexts/10.11 and what kexts did you install to /S/L/E or /L/E?

Here, place the DSDT/SSDT to /EFI/Clover/ACPI/Patched Replace your Config with this, backup your original Replace Kexts folder to /EFI/Clover/ Install kexts in/EFI/Clover/Kexts/Other/LE to /System/Library/Extensions Run permission and cache fix sudo touch /S*/L*/E* sudo kextcache -Boot -U / Screen Brightness might not be control by F11 and F12, try different combo Inspiron_5558_HD4400.zip

My bootpack is available here. Kexts needed to install to /S/L/E are AppleHDA_ALC292 EAPDfix CodecCommander DisableturboboostBattery

Can you try my bootpack here? E5450_HD5500 That include the ALC293 kexts and patches for the Config file. Also included SSDT-1.aml for HDMI Audio. Let me know if the bootpack works for you.

Intel Wireless are not supported and will need to be replaced. Reboot to Clover Gui and hit F4, this will extract the Raw DSDT/SSDT to /EFI/CLOVER/ACPI/Origin Upload your Config.plist and that folder. I'll patch them for you.

Thanks for clarifying. Strange you are missing that file, I have a fresh 10.11.1 build myself and not have that issue. I checked your config, you have ALC255, I'm sure this model uses ALC293. What audio kext are you using? Do you have HDMI video and audio working?

I mean AppleKextExcludeList, did you add or remove something from it? What's its purpose? It's already in /S/L/E, is it missing on your system?

What Windows report is not reliable. You should check the BIOS. See my guide on E7450. You need to set the DVMT to 96MB (0x3). The var might be different on your BIOS than mine so don't rely on it but use it as a reference. So are you on Yosemite?

No AppleKextExcludeList in your files. What exactly did you mod?

Rerun sudo chmod -R 755 /System/Library/Extensions sudo chown -R 0:0 /System/Library/Extensions sudo touch /S*/L*/E* sudo kextcache -Boot -U /

run this from terminal and post the output here. Run a couple of times if needed sudo touch /S*/L*/E* sudo kextcache -Boot -U /

Have you try different ig-platform-id? 0x16260006 works better on my E7450 with HD5500. Have you try modding the DVMT in the Bios? The patch you use above is for Yosemite only, is that what you installed? HD5500 works better with El Capitan...no hanging issue like on Yosemite.

You can remove the intel inject using Clover Configurator to change the Config file so you don't have to turn it off manually. But do you have full graphics acceleration with that option off? Not sure what you mean by high pithed clicking noise. When is that occurring? Are you using voodooHDA or patched AppleHDA?

You probably can't boot without the USB because you don't have Clover installed properly. F4 will extract the raw DSDT/SSDT file to /EFI/EFI/Clover/ACPI/Origin so you could patch them later after you boot The EFI partition will mount when you install Clover, however it'll only mount it the one time. After you reboot, it'll be unmounted. If you need to access the EFI partition, use Clover Configurator 4.25. If you're installing El Capitan, I have all the patched DSDT and kexts in my El Capitan guide.

Upload the DSDT and Config file and I'll patch them for you.

Sorry for the long delay, new guide here.

Are you using Clover or Chameleon? Do you know which guide he followed or bootpack he used? This model has the Realtec ALC292 which is the same on my E7440.

Which bootpack did you use? See here for El Capitan bootpack. It includes an USB injector.

repair permission and cache sudo touch /S*/L*/E* sudo kextcache -Boot -U /

@mergesoft, Replace Config and DSDT to your system and install the kext to /System/Library/Extensions Repair permission and rebuild cache sudo touch /S*/L*/E* sudo kextcache -Boot -U / E6520_audio.zip

Please upload your Config file. I'll add the patches and kext for audio.