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Here are specs: Learn more about the Hewlett-Packard 450 G4 (Z2A94UT#ABA) Quick Info Intel Core i7-7500U 2.7 GHz Screen: 15.6" FHD Memory: 16 GB DDR4 Storage: 256 GB SSD Optical Drive: DVD Super Multi Graphics Card: Intel HD Graphics 620 Video Memory: Shared memory Dimensions (W x D x H)...

Thank you for this guide! If I may suggest an edit, XHCI Hand-off is found under Advanced>USB Configuration>XHCI Hand-off. I hunted for it a while. :) Also, did you install a USB 2.0 cable to the motherboard to boot to the installer USB drive? I am getting the "no" symbol error and...

How do I go about learning kext patching for my specific laptop? Would you suggest DSDT patches as well, or a combination of both?

Gotcha. Sorry I am at a loss as to how to proceed doing this. I take it Nguyenmac's AppleHDAIDT.kext needs specific patches for my system. Any suggestions or developments with audio kexts in PBI over the past 10 days? Thanks in advance Nguyenmac and RehabMan!!!

I ordered a Broadcom Wifi card compatible with OSX: http://www.amazon.com/gp/product/B009YSVSEG/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 Here is a back-and-forth with RehabMan regarding my audio issue. He showed me a simple sleep/wake cycle affects the AppleHDA kext in a way that...

Hello RehabMan, I tried the Reset HDA config.plist tweak you suggested, and am reporting back: unfortunately it did not work. But I am wondering if there is a way to set a delay and enter an automatic sleep/wake cycle after booting as a workaround. Any solution you know that can do that...

I used Kext Wizard to reinstall the original AppleHDAIDT.kext. After I installed, repaired permissions and cleared cache using Kext Wizard and restarted, it worked as it should. Then I shut down (did not choose restart), went to the Clover bootloader screen, and loaded the OS. After that, it...

Hello Nguyenmac, I tried version 1, no real change from the existing kext. When I tried version 2, I lost all sound output devices in the preference pane. I repaired permissions and cleared kext cache using Kext Wizard and restarted, no devices still. Repeated permission repair and kext...

Hello RehabMan, Yes, it's peculiar, but if I start with the Built-In speakers and plug in something to the headphone jack, no change. Then I set the computer to sleep and the screen blinks black, but does not enter sleep completely. Once that occurs, Yosemite Sound Preference pane shows a...

HDMI, sir. Will try the sleep/wake cycle, thank you. What do you think of this post as a possible solution? http://ksktechr.blogspot.in/2014/11/how-to-fix-audio-issue-on-os-x-1010.html I am a little skeptical. Thanks RehabMan!

Rats! Premature enthusiasm. I found that the external headphone jack only works if I plug something in and reboot, and if I unplug, audio does not go back to internal speakers. Joyfult had a similar issue here...

Same issue here.

For the untold hours you put in to help this community, we will forgive this oversight and any others! Thanks to you and RehabMan! I would have a brick instead of a working Hack lappy if not for you two! Your guide...

I rolled back the patch in post #1, and used your updated ProBook Installer. I am reporting success with HDMI video, I have yet to test audio. Attached are troubleshooting files for you to confirm if you would like. Thank you Nguyenmac!!! I am back to trouble-free Apple updates...

Should I also rollback the gigabyte666 patch to the azulframebuffer kext?

Hello nguyenmac, Hopefully this helps you figure out what is going on. Please let me know what else I can post.

It has HDMI. @nguyenmac, I will get you troubleshooting files as best I can tomorrow. Thank you both again.

Hello Nguyenmac, Thank you for posting gigabyte666's patch! I tried the Clover config.plist patch, that did not work. I then tried the terminal command posted first, repaired permissions and rebuilt cache using Kext Wizard, rebooted, and I am reporting success. One question: will updates...

RehabMan, thank you. I installed FakeSMC via Multibeast and was able to boot with the flags from your post #385. Graphics seems to be working, listed as Intel HD Graphics 4600 in Graphics/Displays. I assume if various high resolutions are available, QE/CI is working as well, is that correct...

UPDATE I can still boot into install using the USB drive. I removed all NVIDIA kexts including NVSMU.kext. I removed all GeForce kexts. Installed Chameleon, used boot flags IntelAzulFB=12 GraphicsEnabler=Y dart=0 -v -f UseKernelCache=N Result is attached screenshot