> Upgrade to Monterey helpfully tells you that a lot of your apps aren't going to work, after you have upgraded.
I stopped using the word "upgrade" in reference to Apple's updates a long time ago.
I stopped using the word "upgrade" in reference to Apple's updates a long time ago.
IME kernel extensions (kexts) were definitely related to various kernel panics that I've seen in the past.
In most cases, alternative APIs have been present for quite some time, it's just that some software hasn't been upgraded yet. Deprecation started a few years ago, so it's nothing surprising really.
Similar VPN and virtualization apps work without kexts, so I assume both Tunnelblick and VirtualBox could be rewritten to take the leverage of the new APIs.
At that point just use an iPhone/iPad. The whole point of OSX is that you have enough control over the machine that you can be productive.