Toggle sidebar Toggle sidebar
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

macOS 15 Sequoia on Unsupported Macs Thread

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.
For those of us likely staying on Sequioa.
Just a clear reminder of a great little MrMacintosh video I came across with his usual attention to detail.
How to block Tahoe in software update by creating and installing a profile without having to figure it out from scratch. Very easy.

forums.macrumors.com

How to BLOCK macOS Tahoe Upgrade! OCLP & Supported Macs (Mr. Macintosh)

How to BLOCK macOS Tahoe Upgrade! OCLP & Supported Macs source: Mr. Macintosh 01/31/2026
forums.macrumors.com forums.macrumors.com
 
  • Like
Reactions: TOM1211, roronl, ks23 and 1 other person
ks23 said:
Hello,

I updated my macmini3,1 from macOS 12 to macOS 15. Everything worked fine so far. But my user is no longer an administrator, just a standard user.

How can I give the user administrator rights again?
Unfortunately, I don't seem to have a recovery partition.
Click to expand...
In the meantime I fixed it. Found the Recovery Partition and fixed it via Terminal 🙂
 
  • Like
Reactions: K two and luckyduke23
Just wanted to drop in to update those who helped me with my iPhone connecting to my iMac problem. Since the 15.7.4 update, it's back and working. I did update to OCLP2.5.0N first but that didn't fix it. However after OS update, it's now back to normal. Thanks all.
 
  • Like
Reactions: mib01, rehkram, TOM1211 and 1 other person
Does anyone having issue like 15.7.4 boot hang with progress bar at 40%.-once the turn off the blluetooth logitech mouse. it continue to log screen.
Happen to me twice.
 
  • Like
Reactions: roronl and rehkram
Anyone else having issues with Adobe Acrobat Reader (latest release version 25.001.21223) indefinitely hanging during installation, makes it to the one minute left to go mark. I know that this was an issue quite awhile back on stock OS Macs and older releases of the Reader, but this may have something to do with the OCLP.

I have uninstalled the remains of the install using AppCleaner and manually removing any other bits left over. Several attempts to install without success.
 
Last edited:
  • Like
Reactions: josehill
LookingOut said:
Anyone else having issues with Adobe Acrobat Reader (latest release version 25.001.21223) indefinitely hanging during installation, makes it to the one minute left to go mark. I know that this was an issue quite awhile back on stock OS Macs and older releases of the Reader, but this may have something to do with the OCLP.

I have uninstalled the remains of the install using AppCleaner and manually removing any other bits left over. Several attempts to install without success.
Click to expand...
You could try to install it in safe mode: this solved the problem with the setup, some time ago, IIRC.
 
  • Like
Reactions: LookingOut
… As for my previous problems (double password prompt at boot and at login with FileVault, and always a password request for Startup Disk and Disk Utility), they were solved respectively by reinstalling OpenCore to the main EFI partition with MacBookPro11,3 explicitly selected in the settings (so, not only generically the Host Model), and by reformatting the external disk I had for hosting virtual machines (which somehow had gotten the structure with hidden partitions of a boot disk, probably from some failed attempt to install macOS or Windows). One thing still remains, however: when checking all the disks from Disk Utility directly from within the booted macOS, everything works without issues; while, when checking them from within macOS Recovery (or from an OCLP-bootable USB macOS Sequoia installer flash drive), the checks on the whole disks unexpectedly fail (with encrypted volumes already mounted):

[…]​

Problems were found with the partition map which might prevent booting​

Couldn’t mount disk. : (-69842)​

… while I know that the EFI partitions are OK, as fsck_msdos from the Terminal returns no errors (and no errors, too, for all Disk Utility checks when booted normally into macOS, as said before): maybe a bug in Apple’s Recovery environment, who knows…?
 
Last edited:
  • Like
Reactions: TOM1211
Guys, don't you think it's better to wait for a new version of the KDK to be released before updating macOS via OTA? For example, I'm still using macOS 15.7.3 because the latest KDK available is for that version.
 
  • Like
Reactions: houser
Have you tried simply leaving the installer alone for some time (maybe even an hour)…? The Adobe Acrobat installer can often be very slow…
 
  • Like
Reactions: LookingOut
Sven G said:
… As for my previous problems (double password prompt at boot and at login with FileVault, and always a password request for Startup Disk and Disk Utility), they were solved respectively by reinstalling OpenCore to the main EFI partition with MacBookPro11,3 explicitly selected in the settings (so, not only generically the Host Model), and by reformatting the external disk I had for hosting virtual machines (which somehow had gotten the structure with hidden partitions of a boot disk, probably from some failed attempt to install macOS or Windows). One thing still remains, however: when checking all the disks from Disk Utility directly from within the booted macOS, everything works without issues; while, when checking them from within macOS Recovery (or from an OCLP-bootable USB macOS Sequoia installer flash drive), the checks on the whole disks unexpectedly fail (with encrypted volumes already mounted):

[…]​

Problems were found with the partition map which might prevent booting​

Couldn’t mount disk. : (-69842)​

… while I know that the EFI partitions are OK, as fsck_msdos from the Terminal returns no errors (and no errors, too, for all Disk Utility checks when booted normally into macOS, as said before): maybe a bug in Apple’s Recovery environment, who knows…?
Click to expand...
I tried Disk Utility First Aid from Recovery also on my M3 MacBook Air: well, here the device of the internal disk checked out successfully (it’s without an EFI partition, being on Apple Silicon); while the same previous error (-69842) came out when checking the device of an external disk (GUID, with an EFI partition): so, it looks like it might be some form of bug in Recovery, related to EFI (?)…
 
LookingOut said:
Anyone else having issues with Adobe Acrobat Reader (latest release version 25.001.21223) indefinitely hanging during installation, makes it to the one minute left to go mark. I know that this was an issue quite awhile back on stock OS Macs and older releases of the Reader, but this may have something to do with the OCLP.

I have uninstalled the remains of the install using AppCleaner and manually removing any other bits left over. Several attempts to install without success.
Click to expand...
I realized at some point that I didn't need Acrobat Reader anymore. Apple's free Preview app does everything I need. That was a huge relief, given the perennial Adobe hassles and general crapware.
 
  • Like
Reactions: roronl, jgleigh and MacMorrison
rehkram said:
I realized at some point that I didn't need Acrobat Reader anymore. Apple's free Preview app does everything I need. That was a huge relief, given the perennial Adobe hassles and general crapware.
Click to expand...
I’ve come to the same conclusion. Just going to stick with Preview. I wanted to try Acrobat Reader to see if I could extract pages out from a document. I found an online solution for this task.
 
  • Like
Reactions: rehkram
Sven G said:
… As for my previous problems (double password prompt at boot and at login with FileVault, and always a password request for Startup Disk and Disk Utility), they were solved respectively by reinstalling OpenCore to the main EFI partition with MacBookPro11,3 explicitly selected in the settings (so, not only generically the Host Model), and by reformatting the external disk I had for hosting virtual machines (which somehow had gotten the structure with hidden partitions of a boot disk, probably from some failed attempt to install macOS or Windows). One thing still remains, however: when checking all the disks from Disk Utility directly from within the booted macOS, everything works without issues; while, when checking them from within macOS Recovery (or from an OCLP-bootable USB macOS Sequoia installer flash drive), the checks on the whole disks unexpectedly fail (with encrypted volumes already mounted):

[…]​

Problems were found with the partition map which might prevent booting​

Couldn’t mount disk. : (-69842)​

… while I know that the EFI partitions are OK, as fsck_msdos from the Terminal returns no errors (and no errors, too, for all Disk Utility checks when booted normally into macOS, as said before): maybe a bug in Apple’s Recovery environment, who knows…?
Click to expand...

-69842 - ressource is busy

Check with sudo lsof | grep disk(whateveritis) and kill the process.
Additionally or better formost a thorough read through the log files would be a good understand and eventually fix such issues.
 
  • Like
Reactions: Sven G
mib01 said:
Guys, don't you think it's better to wait for a new version of the KDK to be released before updating macOS via OTA? For example, I'm still using macOS 15.7.3 because the latest KDK available is for that version.
Click to expand...
Only if you have a Mac that needs it. Fortunately I don't have a Mac with an AMD graphics card, or other chacteristics requiring the KDK update. So no issues here.

There's documentation available on the dortania GitHub describing the Mac config issues for which a KDK update is required / recommended.
 
Last edited:
  • Like
Reactions: roronl, hvds and houser
You must log in or register to reply here.
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.
Top Bottom
Back