Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Status
The first post of this thread is a WikiPost and can be edited by anyone with the appropiate permissions. Your edits will be public.
Today I just install Monterey although the installation is successful I still get trouble
I get Apple.com/startup help 3 times . I turn off pc and turn on it back pc continue installing
When I boot to Monterey I still get Apple.com/startup
Turn off and on it boot to Monterey . Do I made any mistake?
Monterey run so smoothly
Hello! I get the same problem. cMP4.1>5.1. I get “prohibition sign” after every reboot. Initial boot goes fine. But after reboot the loading line goes waay slow and then “prohibition sign”. This start up massage first occured on reboot after updating to High Sierra without any OpenCore.
Tried to solve it: 3x NVRAM reset. No luck.
Installed OC 0.9.2 + Monterey 12.6.6 on a clean drive. But the problem still presist. Is there anything I can do?
 
I'm finally going to make the jump from Mojave to Monterey on my Mac Pro (see my signature for current hardware). I'm running Mojave on PCIe SSD and I'm going to install Monterey on a SATA SSD until I'm sure I've done everything correctly. I plan to migrate Monterey onto PCIe SSD once I'm confident there are no issues.

I have a USB Razer mouse and an original USB apple keyboard connected currently and I'm hardwired to my router. I have no issues with Bluetooth in Mojave.

Questions:

I have a Nvidia GTX680 flashed with MacVidCards ROM which runs natively in Mojave. Are there any issues using Martin Lo's opencore with cards already flashed with Mac EFI?

Does anyone see any problems with what I plan to do above?
 
FYI no issues updating from 12.6.6 to 12.6.7 using standard software update and procedure outlined in post #1314.

Screen Shot 2023-06-21 at 3.09.23 PM.png
 
  • Like
Reactions: h9826790
Hello! I get the same problem. cMP4.1>5.1. I get “prohibition sign” after every reboot. Initial boot goes fine. But after reboot the loading line goes waay slow and then “prohibition sign”. This start up massage first occured on reboot after updating to High Sierra without any OpenCore.
Tried to solve it: 3x NVRAM reset. No luck.
Installed OC 0.9.2 + Monterey 12.6.6 on a clean drive. But the problem still presist. Is there anything I can do?


What SSD do you have?

It was suspected the Samsung 870 Evo was to blame when I had this problem.

I still do no matter what I try on both 5,1 Mac pros. If I reboot they will do prohibited sign after very slow progress bar.

If normal start from powered off then no problems.
 
  • Like
Reactions: h9826790
I'm finally going to make the jump from Mojave to Monterey on my Mac Pro (see my signature for current hardware). I'm running Mojave on PCIe SSD and I'm going to install Monterey on a SATA SSD until I'm sure I've done everything correctly. I plan to migrate Monterey onto PCIe SSD once I'm confident there are no issues.

I have a USB Razer mouse and an original USB apple keyboard connected currently and I'm hardwired to my router. I have no issues with Bluetooth in Mojave.

Questions:

I have a Nvidia GTX680 flashed with MacVidCards ROM which runs natively in Mojave. Are there any issues using Martin Lo's opencore with cards already flashed with Mac EFI?

Does anyone see any problems with what I plan to do above?

The GTX680 is only supported upto Big Sur with the manually configured OpenCore package.
For Monterey and Ventura, you would need to use OCLP and not the manually configured OpenCore.
Besides, this thread is about enabling H/W acceleration of AMD GPU's.
The GTX680 does not support HEVC acceleration.
You would need to consider replacing it with an AMD GPU if you wish to have H.264 & HEVC encode & decode.
 
Last edited:
  • Like
Reactions: h9826790
The GTX680 is only supported upto Big Sur with the manually configured OpenCore package.
For Monterey and Ventura, you would need to use OCLP and not the manually configured OpenCore.
Besides, this thread is about enabling H/W acceleration of AMD GPU's.
The GTX680 does not support HEVC acceleration.
You would need to consider replacing it with an AMD GPU if you wish to have H.264 & HEVC encode & decode.
Yeah sorry, I had multiple tabs open scanning the forums here. I didn't realize I posted it in the this thread.
 
Possible to run 8x32GB RAM in macOS (user need to mod the config.plist manually. Replace the false below CustomMemory to true)
Two questions to this:

1. Is this sufficient to get the 32GB-sticks to work right now or are there still exact specs (size, speed) to be entered in addition?

2. Does this any harm to systems where no "custom memory" (32 gig sticks) is installed? Any reasons not to keep it set to "true" by default?

Thanks in advance for enlighting me! 🙂
 
Last edited:
Two questions to this:

1. Is this sufficient to get the 32GB-sticks to work right now or are there still exact specs (size, speed) to be entered in addition?

2. Does this any harm to systems where no "custom memory" (32 gig sticks) is installed? Any reasons not to keep it set to "true" by default?

Thanks in advance for enlighting me! 🙂
1) Only some 32GB DIMM can work, not all. So far, it seems only the 4Rx4 RDIMM can work. Speed shouldn't be a problem. The cMP should auto select the highest possible clock speed to run them anyway.

2) There should be no harm to do so. In fact, that memory spoofing is quit cosmetic, you can set that to 12x128GB etc, and the cMP will still run. However, set that to spoof with 32GB DIMM somehow magically make the cMP can really boot to desktop with 32GB DIMM in macOS.

The reason not to enable that by default is mainly because to keep the system info as accurate a possible. Once turn that on, no matter what the actual memory config is, the system will report 8x32GB. Which isn't true for absolute most cMP. So, I make it optional.

If you only care about function, but not any other cosmetic issue. My understanding is that you can keep it enabled.
 
Last edited:
Thanks for your reply!
1) Only some 32GB DIMM can work, not all. So far, it seems only the 4Rx4 RDIMM can work. Speed shouldn't be a problem. The cMP should auto aelect the highest possible clock speed to run them anyway.
I ordered what (i think) some others had success with. So i hope from the hardware-point the modules should work. Will likely arrive today!

Hynix 32GB.jpg


2) There should be no harm to do so. In fact, that memory spoofing is quit cosmetic, you can set that to 12x128GB etc, and the cMP will still run. However, set that to spoof to 32GB DIMM somehow magically make the cMP can really boot to desktop with 32GB DIMM in macOS.
So it does, if only "CustomMemory" is set to "true" and no other edits are made? And also the full amount is really made use of?
 
Thanks for your reply!

I ordered what (i think) some others had success with. So i hope from the hardware-point the modules should work. Will likely arrive today!

View attachment 2222356


So it does, if only "CustomMemory" is set to "true" and no other edits are made? And also the full amount is really made use of?
So far, no tester can make the cMP crash by spoofing the memory config (as long as the RAM itself can actually work). And apparently the cMP can use all memory regardless you spoof it to higher / lower capacity.
 
Everything works just fine!

About this Mac.png

System Info.png


Meanwhile i reduced to 192GB, which gives much better memory performance (according to GeekBench). Also with all of the slots populated, even with no issues in functionality, i had two of the red LEDs on the CPU-board lit up, which are off again with the triple channel configuration.

Nice to have this working now!
 
Hello. I have a MP 5.1 with a 5700xt, Monterey and OCLP. I noticed it is unable to encode HEVC 10bit through HW accelerate, either in Compressor, Resolve or Quicktime. Did I miss something?
 
Hello. I have a MP 5.1 with a 5700xt, Monterey and OCLP. I noticed it is unable to encode HEVC 10bit through HW accelerate, either in Compressor, Resolve or Quicktime. Did I miss something?

Yes, the macOS API that provides direct access to hardware encoders and decoders that enable hardware assistance for video decompression/compression/colour grading and pixel moving, Apple VideoToolbox, does not support 10bit compression with AMD GPUs, but the hardware itself is capable since the first generation of NAVI GPUs and there are patches for ffmpeg on Linux.

Apple seems to only support 10bit compression with Apple Silicon Macs and Macs with T2, correct me if I'm wrong
 
  • Like
Reactions: zazaki and h9826790
I came across some comments saying it was possible with a Vega II (but it seems it was a MP 7.1 with HW acceleration "on board"). So @tsialex, your statement makes sense.
 
EDIT - resolved. Enabling BlueToolFixup resolved the issue.

Any hints for using a Hideez USB Bluetooth Dongle?
  • 4,1->5.1 single CPU X5675
  • I have Monterey working using Martin's config.
  • The Hideez dongle is meant to work without alteration in Monterey (just need a command to tell the operating system to use external USB bluetooth).
  • The dongle works with Mojave! (so not a faulty dongle)
  • I can see the Hideez dongle in System Information under USB
  • Under Bluetooth I have an unknown device - BCM_4350C2
  • Tried it directly connected to the mac and through a hub (cinema display)
Is there anything specific to Martin's config that would prevent the Hideez dongle from working?
 
Last edited:
anyone here who upgraded from the VII to a RX6800XT and can share wether or not he/she gained a meaningful increase in real world performance?

thanks for any tips here
 
You may disable all GPU related kext for Mojave only in OpenCore config by setting the min Kernel.

However, if that's too complicated. I think you better go for RefindPlus. So that you always default boot to RefindPlus, then you can select native Mojave, or OpenCore to further bridge boot Monterey.

Or you can simply flash you cMP

Therefore, your cMP default to boot OpenCore + Monterey. And you can simply hold Option key to boot native Mojave on the day you need it.
Changing MinKernel to 19 for the GPU kexts worked to allow me to boot into Mojave - the screen blanks out where it used to crash, but then the progress bar reappears and it continues.
 
Slowly inching my wat towards to fully functioning system, but new issues keep appearing:

I now have a Hideez Bluetoth Dongle working in Monterey (note - it just needs the BlueToolFix entry set to true in the config.plist).

BUT I don't have bluetooth available for the boot screen picker! Is there a trick?
I currently have OpenCore installed on USB.

EDIT - OK - i wish I havd known this before buying the Hideex Bluetooth Dongle and waiting for it to arrive patiently - for bluetooth at bootscreen time you need a bluetooth module with HID Proxy.
I've now ordered a BCM943602CDP, adapter card, pigtail cable and antenna from aliexpress. Fingers crossed all the bits are correct.
 
Last edited:
Slowly inching my wat towards to fully functioning system, but new issues keep appearing:

I now have a Hideez Bluetoth Dongle working in Monterey (note - it just needs the BlueToolFix entry set to true in the config.plist).

BUT I don't have bluetooth available for the boot screen picker! Is there a trick?
I currently have OpenCore installed on USB.

EDIT - OK - i wish I havd known this before buying the Hideex Bluetooth Dongle and waiting for it to arrive patiently - for bluetooth at bootscreen time you need a bluetooth module with HID Proxy.
I've now ordered a BCM943602CDP, adapter card, pigtail cable and antenna from aliexpress. Fingers crossed all the bits are correct.
There is actually a mac 4,1 and 5,1 compatible card that will give you blazing fast Wifi and Bluetooth if you have a card free. The card is powered by USB. Make sure to route the power cable from PCI card to USB.2.0 not any 3.0 cards you may have installed. The mac will instantly recognize it. Just make sure to tell the mac that you aren't using the native cards anymore or simply take them out. Amazon.com: fenvi T919 PCI-E WiFi Adapter Continuity Handoff BCM94360CD WiFi Card for macOS Windows 7 8 10 11 Native Airport BT4.0 1750Mbps Dual Band 802.11ac Beamforming+ WLAN Plug and Play Cataline Mojave OS X : Electronics
 
As an Amazon Associate, MacRumors earns a commission from qualifying purchases made through links in this post.
  • Like
Reactions: MacGarage
Slowly inching my wat towards to fully functioning system, but new issues keep appearing:

I now have a Hideez Bluetoth Dongle working in Monterey (note - it just needs the BlueToolFix entry set to true in the config.plist).

BUT I don't have bluetooth available for the boot screen picker! Is there a trick?
I currently have OpenCore installed on USB.

EDIT - OK - i wish I havd known this before buying the Hideex Bluetooth Dongle and waiting for it to arrive patiently - for bluetooth at bootscreen time you need a bluetooth module with HID Proxy.
I've now ordered a BCM943602CDP, adapter card, pigtail cable and antenna from aliexpress. Fingers crossed all the bits are correct.
Boot
Slowly inching my wat towards to fully functioning system, but new issues keep appearing:

I now have a Hideez Bluetoth Dongle working in Monterey (note - it just needs the BlueToolFix entry set to true in the config.plist).

BUT I don't have bluetooth available for the boot screen picker! Is there a trick?
I currently have OpenCore installed on USB.

EDIT - OK - i wish I havd known this before buying the Hideex Bluetooth Dongle and waiting for it to arrive patiently - for bluetooth at bootscreen time you need a bluetooth module with HID Proxy.
I've now ordered a BCM943602CDP, adapter card, pigtail cable and antenna from aliexpress. Fingers crossed all the bits are correct.
Boot Screen Picker? Did you Flash your BOOT ROM yet? If not, simply visit this page: Manually Configured OpenCore on the Mac Pro | MacRumors Forums Scroll down to the "Appendix: Native boot screen support" . Read carefully.

Take a picture of your BootRom Chip before you flash your Rom.

Identify your Mac's firmware chip

To complete some of the steps below, you may need to know the part number of your Mac's firmware chip.

Firmware chip location.jpg
Firmware chip part number.jpg
Firmware chip locationPart number: SST25VF032B

Possible part numbers include SST25VF032B, MX25L3205D, and MX25L3206E.

You will be downloading a tool from DOSDUDE called the "ROMTOOL" it's super easy and probably the best thing if you have multiple boot drives in your computer. After you successfully flash your boot rom you will be able to hold down the option key and get a boot picker option.
 
There is actually a mac 4,1 and 5,1 compatible card that will give you blazing fast Wifi and Bluetooth if you have a card free. The card is powered by USB. Make sure to route the power cable from PCI card to USB.2.0 not any 3.0 cards you may have installed. The mac will instantly recognize it. Just make sure to tell the mac that you aren't using the native cards anymore or simply take them out. Amazon.com: fenvi T919 PCI-E WiFi Adapter Continuity Handoff BCM94360CD WiFi Card for macOS Windows 7 8 10 11 Native Airport BT4.0 1750Mbps Dual Band 802.11ac Beamforming+ WLAN Plug and Play Cataline Mojave OS X : Electronics
Thanks for your reply.
I did look at PCIe options, but I figured slots were too valueable when the mini PCIe option exists, so I ordered a BCM943602CDP with adapter, pigtal, and external antenna. It would be fixed by now but I ordered the wrong pigtail and adapter card!
 
As an Amazon Associate, MacRumors earns a commission from qualifying purchases made through links in this post.
  • Like
Reactions: blauesliebe7
I want to make a partition with 10.14 but I want it to be formatted as HFS+. To me, the better way is to interrupt the install process and change items in the install files rather than the CCC approach. To do it that way though, I need to boot from the usb installer but dont know what setting to put on OC to make that work. No usb shows

I suspect there is no HFS+ in the drivers, that may be the culprit... Not sure version of OC here hmm..bless app would give it away

Anyway thanks for all of course
 
Last edited:
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.