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EmbeddedOSInstallServiceĪs a test, I decided to delete the contents of /Volumes/EFI/EFI, reboot and look at the logs. So clearly, Apple is looking for this “Embedded OS” and if it can’t find it, it attempts to rebuild the boot process. Unfortunately, it looks like this how now been taken to a new level:Īs a guess, I decided to look at the EFI volumeĮmbeddedOSInstallService: Couldnt find memboot image in ESP:įile:///Volumes/EFI/EFI/APPLE/EMBEDDEDOS/mboot

Allister Banks first wrote about this during the Thunderstrike vulnerability and I have been complaining about this for some time. So what is being deleted when wiping the entire disk? Apple’s EFI container for TouchBarįor some time, Apple has been installing EFI/firmware updates through standalone packages.

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SetupAssistant immediately prompted the critical software update. It was with this workflow that I was finally able to recreate the issue. After some discussions with Joe, we had a theory as to the true culprit of the issue. For informational purposes, workflow 5 was tested due to Imagr’s inability to wipe FileVault encrypted volumes and was the closest thing to Joe’s testing. In none of these tests did I receive the critical software update.

Deploy image to current volume - no wipe.

While trying to recreate this issue, I started off with most simple workflow and methodically tried adding features. Good news everyone: Mac imaging isn’t dead … yet. What triggers this? Is Mac imaging finally dead? Trying to recreate the issue Obviously a lot of engineering effort went into this - this is not a fluke. This entire process takes about two minutes to finish and then you can login into the Mac.

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If you did connect your TBP to an online source, the critical update was downloaded, installed and your system was rebooted. Your Mac can't be used until this update is installed. Upon reboot, SetupAssistant was not skipped and you were instead greeted with this lovely screen:Īttempting to skip this page would lead to an additional failure:Ī critical software update is required for your Mac, but an error was encountered while installing this update. Install/Touch /private/var/db/.AppleSetupDone.I was initially worried about this discovery due to it breaking a very typical thin imaging workflow: What if the new TBP Macs were the first piece to this future? Whether it was Michael Lynn’s excellent blog post, m(DM)acOS, APFS or even Sal Saghoian’s position being axed, many macadmins (myself included) are worried about the future of macOS administration being a MDM only world.

I think it’s safe to say the macadmin community has been hearing rumblings about the future of macOS administration.

(If you don’t want to read this whole post or want to dupe the radars I submitted, scroll down to As a macadmin, does this impact me? for a TL DR version.) Critical Software Update? Given that I did not see this issue when testing DEP, I set forth to to attempt to duplicate the issue and find out what triggered this event. Select a Wi-Fi network below, or click Other Network Options to connect to the internet using other network devices.

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To install this update you need to connect to a network.

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Last week Joe Chilcote discovered an interesting message when imaging a Late 2016 MacBook Pro TouchBar (from here on out referred to as TBP):Ī critical software update is required for your Mac. The Untouchables - Apple's new OS 'activation' for Touch Bar MacBook Pros A critical software update is required for your Mac.Īctivation macOS watchOS Touch Bar MacBook Pro Sierra