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Apple @ Work: How to add an existing Mac to Apple Business Manager without wiping it

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Why This Matters

This article highlights a new method, add2abm, that enables IT managers to add existing Macs to Apple Business Manager without wiping the device, simplifying device management and reducing downtime. This innovation is significant for organizations seeking seamless integration of their existing hardware into Apple’s management ecosystem, enhancing efficiency and user experience for both IT teams and employees.

Key Takeaways

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Apple Business Manager (and Apple School Manager) is foundational to the modern Apple IT management experience. With that said, if a Mac isn’t in it, device management is a different ballgame. You might have a fleet of Macs that were purchased through a consumer channel or inherited from a company merger. If you want them in Apple Business Manager so you can use Automated Device Enrollment, you will generally need to wipe the device. What if you don’t want to? That’s where add2abm comes into play.

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What about Apple Configurator?

If you use Apple Configurator to add a Mac to your organization, you are traditionally forced to erase the entire machine. This is a non-starter for a device that is already in an employee’s hands. It requires a full backup, a complete wipe of the device, and a long morning of restoring data. add2abm is a potential solution for you.

It allows you to re-trigger the Setup Assistant on a Mac that is already configured without wiping any of the data on the hard drive. It works by temporarily removing the Apple setup flag and moving local user records so the system thinks it is brand new.

This is a major unlock for IT administrators who need to enable Automated Device Enrollment on hardware already in use by an employee. The entire process is fully reversible. You run the script to hide the users, add the Mac to your server using your iPhone, and then run the script again to put everything back exactly where it belongs.

How it works

The workflow requires physical access to the device and access to macOS Recovery, but here are the steps:

Shut down the Mac Hold Touch ID/power button to boot into macOS Recovery Authenticate as volume owner Connect to the internet Open Utilities Open Terminal Execute the script to back up user records and reboot Unlock the disk upon boot, if encrypted Proceed in the Setup Assistant to the Country & Region step Bring the iPhone running Apple Configurator in close proximity to the Mac Add the computer to the MDM server of choice in ABM/ASM Shut down Mac on success Hold Touch ID/power button to boot into Options (macOS Recovery) once again Authenticate as volume owner Connect to network (if not connected) Open Utilities → Terminal (or use ⌘⇧T) Execute the script again to restore user records from backup and reboot Unlock disk upon boot, if encrypted Agree to macOS Terms and Conditions Log in to the local user account Run sudo profiles renew -type enrollment (local admin account context required) in Terminal to force Automated Device Enrollment workflow from your MDM

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