Here’s what I posted on my Slack channel when asked a similar question.
Not all our software can be compiled and notarized yet for Catalina. We expect to be ready long before Catalina finally rolls out – but Catalina still has some serious instability (be careful using iCloud right now) – so we’re taking our time rolling out various plugins.
For now Stacks 3.6 and Stacks 4.0 beta are recompiled and notarized for Catalina. And we expect to start rolling out the others at about one per week after Stacks v4.0.1 ships – which is hopefully not too long from now.
I’ve been working 12 hour days pretty much since WWDC do try to get all our products ready in time for the Catalina release. I do want to support it, of course. And we’ll get there, but it’s a mountain of work. And we’re just a mom&pop style company. It’s just me and my wife. I write the software, Christi answers the support email. So huge changes like this can take a little while to work through.
Catalina imposed quite a few new challenges – and especially for plugins – (the hardened runtime is particularly difficult for plugin debugging since we can’t introspect the app’s memory in some ways – Instruments is pretty much dead now ) and notarization changes for non-app bundles (like plugins) weren’t finalized until the week of WWDC.
It’s funny, I notarized Stacks 3 back in April or May when the first documentation rolled out on the Apple dev site for Mojave. But at the time it just didn’t work for plugins. But during the week of WWDC all of sudden… bing… like magic the original notarization started working. LOL Betas and developer releases are a bit scattershot for a while.
The plugins that were easy to get working (like Stacks) are working today. I even notarized a few versions back. I think you can use Stacks 3.4 all the way through about half of the Stacks 4 betas and of course to Stacks 4.0.
The Stacks 4 release drops today (in about 7 hours yeah!). I’ve integrated notarization into our build server – so all our releases going forward should be notarized before the auto-update triggers. After a weekend off we expect to have to roll out at least one Stacks bug-fix update.
But after that I’ve penciled in one plugin per week until they’re all done. It’s a bit optimistic – but I think once we get rolling the problems that need solving are mostly the same problems for each plugin.
I’ll start with PlusKit and SiteMap. Those have had the most recent changes so should be similarly easy to get going.
If you have any questions, don’t hesitate to ask. I am a bit busy with the big release today – I’ll apologize in advance in case I don’t get back to you immediately.