macOS Content Caching Fails to Propogate Security Updates

Last Week on My Mac: Security updates are down again – The Eclectic Light Company:

Howard Oakley is doing an amazing job at diagnosing and bringing to light (pardon the pun) issues involving macOS Content Caching Server:

Over the last three months, of the nine security updates to XProtect pushed by Apple, only one has been delivered and installed correctly through my Monterey Content Caching server, that on 4 August. The other eight security updates to XProtect and its new companion XProtect ‘Remediator’ all downloaded correctly from my local server, but then failed to install.

After reviewing Howard’s articles on the topic, and using his impressive apps to identify whether I had an issue, I discovered that all three of my Macs behind a Mac mini server running content caching had failed to receive critical security updates. I’ve now disabled the caching server. If it can’t be trusted to deliver security updates it doesn’t matter how much internet bandwidth I can save, nor how much faster I can update machines. Security is more important than that.

Apple needs to do better. Maybe they need to rewrite the Content Caching Server in Swift? 🥁

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