Have a Mac Pro that boots fine with an SSD if it has the OS on it. However when you wipe the OS and go back to reinstall (with external OS installer) it installs and formats fine, does the install process then after it almost finishes it goes to a blinking folder. So I tried internet recovery and guess what popped up? MONTEREY came up as the Internet recovery OS. So I went ahead and installed that, same issue again. It kept going back to recovery to install the OS when it almost completes. I know if I install it externally from another MacBook or Mac Mini on the SSD it will boot into the OS, but why is it not allowing it to be installed on the Mac Pro itself? Possibly bad EFI? Thoughts to solving this?
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MEOWING IN THE IMPOSSIBLE UNIVERSE! -
Re: Mac Pro Late 2013 Issue
This is the garbage can one right? Haven't had any experience on them, normally send everyone directly to Apple ;-)
When I've seen this on other Mac's, it's because the installer converts the file system to APFS, and the firmware has failed to update to a APFS aware version. But I guess you've already checked for that, so I'd say try a donor EFI and go from there. -
Re: Mac Pro Late 2013 Issue
Yes Garbage can. I’m leaning towards corrupted firmware since it has an update Monterey firmware. May need to revert back to older firmware.sigpic
MEOWING IN THE IMPOSSIBLE UNIVERSE!Comment
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Re: Mac Pro Late 2013 Issue
Ok, update. Installed High Sierra outside the machine and it works 100% did an internal Mojave update and it lost the install and gave a question mark folder. When I turn it off and hold Alt/Option there is EFI BOOT to continue to pick up where it left off.sigpic
MEOWING IN THE IMPOSSIBLE UNIVERSE!Comment
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Re: Mac Pro Late 2013 Issue
So I’m now assuming this is an EFI issue. However the machine works 100% when the os is loaded on a drive.sigpic
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Re: Mac Pro Late 2013 Issue
I swear to God if Command Option P R solved this I’m taking a mental break ��sigpic
MEOWING IN THE IMPOSSIBLE UNIVERSE!Comment
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Re: Mac Pro Late 2013 Issue
Yup it worked…..I’m madsigpic
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Re: Mac Pro Late 2013 Issue
ROTFL!! I've been there!Comment
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So the computer works minus a flaw with the HDMI port. LCDs get detected but they won't display. I plug the LCDS into the Thunderbolt port no issue. HDMI port doesn't seem to display. So I plugged in multiple monitors and used the HDMI port and it detects the display but won't give an image. One time it gave a grainy colorful distorted image which makes me wonder if it's a bad HDMI port or Gpu Board? Anyone have any ideas? I am leaning towards a Bad hdmi, or bad D300 GPU or maybe the top logic board? I have never seen this issue before and would like to fix it. Any suggestions would help. I believe...
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Sub: Missing enable on +5v sec pwr rail AMD Firepro D500-B/Mac Pro late 2013
Ref: 1/ MacPro6,1 Late 2013/A1481 MD878LL/A (3.5 GHz 6 Core Xeon E5-1650v2)
Gfx-B: APN: 661-7548 PPN: 820-3533-A AMD FirePro D500-B 3GB Vmem
2/ Figure 1 Gfx-D500-B Front Facing
3/ Figure 2 +5v supply (zoom-in)
Intro:
While troubleshooting a Mac Pro(6,1) referenced above I discovered the +5v secondary supply did not stand up on the D500-B graphics card as a result of a missing enable signal. The +3.3v secondary rail was the only rail that did standup. I tried to perform...12-07-2023, 09:55 PM -
Hi,
BIOS update bricked my laptop - after restart the was a prompt to Proceed with ROM flash or Abort. None of 2 options worked - upon restart the same prompt shown.
I downloaded [BIOS update].exe file from Lenovo Support > extracted [firmware descriptor].fd file > renamed it to [correct crisis file name].bin.
With crisis file on USB drive the Proceed with ROM option launches recovery - after displaying the current and the new BIOS version, the process terminated immediately with validation error:
Not allow flash. Boot Guard version verification...04-28-2024, 03:43 PM -
Hello, I have an iMAc 27 inch late 2013 EMC 2639 at work that doesn't start, it has a prohibited symbol and/or when I connect the system via USB it stops on the apple.
Is this feature locked in the bios?
Thanks in advance -
this is my first time having this issue...everytime turn on will have this kind of word before apple logo appear....and sometimes just stuck here and have to force shutdown and turn on again....anyone have solution for this?...
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