Some Big Sur users are unable to update macOS due to an MDM bug

Some Big Sur users are unable to update macOS due to an MDM bug


Earlier this week, various macOS sysadmins started recitation some Apple devices failed to update to Big Sur version 11.1. Affected users may see the 11.1 update, but then it will disappear from the UI update and from the command line softwareupdate device despite not being installed.

Error update request

Developer Victor Vrantchan, from the open source project MicroMDM, says he has discovered the problem. Some Macs erroneously require 11.0.1 instead of 11.1 from Apple ‘s update server – that update will be rejected if that device is already running 11.0.1 or later, as most of which.

Apple update servers don't like it when you request a system update that is older than your current version.
Enlargement / Apple update servers don’t like it when you request a system update that is older than your current version.

While the erroneous claims themselves are clear enough, the breach situation is not so great. According to Vrantchan, making the erroneous request “somehow corrupts the state of the software update process,” leading to a system that no longer displays the update as an option in the -Systems between.

By restarting the affected system, the update will appear again – but that may or may not help; if the next attempt to install 11.1 generates the same 11.0.1 error request, the problem behavior just repeats itself.

Removing the MDM profile – for non-Macs and non-sysadmins, this is Apple’s deceptively named mobile device management service, which allows education and enterprise organizations to manage and manage monitor the fleets of macOS and iOS devices – also make the update visible. That said, mortals should not attempt this work lightly; messages with MDM can adversely affect system security, for which there is no guarantee re-the Mac will be registered in his workplace smoothly, either.

Can I download the 11.1 update manually?

One approach that seems obvious is to simply download and manually install the update package for Big Sur 11.1. Unfortunately, Apple has not recommended combo update packages – there is there is no manual package to download or install.

For macOS Big Sur, the format of the updates has changed – and can no longer be installed without internet access. Update packages must come directly from Apple, and must be regulated by the softwareupdate own process. It is not even possible to use a custom URL for softwareupdate more.

How – or when – can I fix this?

So that we have more concrete information about the causative condition softwareupdate to request an error 11.0.1 instead of 11.1, there is no surefire way to resolve the issue. Many users report that after restarting and trying to update again – in some cases, after restarting and trying several times – the update goes through properly.

Other users report that the removal of the MDM image completely eliminated the issue – although we would still think Hail Mary is very dangerous.

Since it is not possible to download and install system updates manually as user-installed packages in Big Sur, it may be difficult to find the bug. The beast may not appear when the system asks for a different version number, so an update to 11.2 may override the buggy requests so it can fix the bugs into 11.2 without intervention. It would also be possible – if it’s terribly hacky – for Apple to introduce the update to an offline patch that won’t affect the OS version number.

All else failed, a full reinstall of Big Sur from the App Store should bring you to 11.1 – although it is a 12.6GB download, and as with any major OS installation, you should be absolutely sure that you have a good backup of all your data. ron effort.