munki VS autopkg

In the non-MDM tool space, look into Munki https://www.munki.org/munki/

this experience is an indication that the opco didn't hire the right expertise. If the numbers you quoted ie 30k desktops, 50k total were not macs, it's clear that the org didn't have the kind of mac experience needed to manage a a new org with all macs.

It's entirely possible for administration of macs.

Start networking/asking around with places like Disney or Pixar, etc which have a large amount of graphic artists using macs. For example, from Disney https://github.com/munki/munki gets you to a certain point.

Other tools like Kandji (lightweight) and the 900 lb gorilla in the industry Jamf gets you the other management / administration bits needed

If this opco that you referred to never got a Jamf rep to work with them and to try out their (yes, very expensive) products, then this is mostly inexperience with the mac ecosystem.

There's a decent open source option: https://github.com/munki/munki

I got to use it at work at Meta (as end user), and it seemed to work quite well. They delivered Android SDKs/IDEs and a bunch of other things that I'd personally install through Brew with Munki.

Munki is not an MDM and I recently learned there's this project called Installomator that might help.

Or Munki

This is a feature of munki called default manifest resolution. Though I prefer to avoid this and explicitly set the client identifier for all devices.

another option is munki https://github.com/munki/munki, for the software update part,

Would it be Autopkg https://github.com/autopkg/autopkg or autopkgr https://github.com/lindegroup/autopkgr by any chance?

I’d recommend you look into AutoPkg (https://github.com/autopkg/autopkg). It can do exactly what you ask - check the repo for new releases, and download them. It can even package them up if needed, or customise the package for you. Depending on the MDM you use, and/out your scripting ability, you could even have it upload the package to the MDM.

AutoPkg (Terminal app, takes recipes from GitHub to build packages) https://github.com/autopkg/autopkg

Something fancier would be setting up an autopkg build box a + munki server to deploy applications like a real macadmin.

Autopkg https://github.com/autopkg/autopkg

If anyone comes across this with the same question I found a helpful utility is autopkg. https://github.com/autopkg/autopkg Instead of a simple notification, I created a daily job that runs an autopkg update on selected apps I care about and adds it to my Testing Manifest Munki Repo. The Manager Software Center app notifies me when a package has an update the next time the client checks in.