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Yesterday, I was working on Transloader v3.0. In particular, on its push notifications and making sure everything syncs properly.
Today, I wanted to continue working on this, but found myself unable to. My Mac suddenly didn’t receive CloudKit push notifications anymore.
Even worse, neither of the delegate methods

- (void)application:(NSApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken

and

- (void)application:(NSApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error

weren’t called anymore – without any code changes. Something was wrong.

But here we are, a couple of hours later, and everything’s working again. Finally.
So, to save you some time should this happen to you, here’s what I did:

Restart

I restarted my Mac – the obvious solution. You might think. Only that it didn’t work, the problem persisted. But it’s still the first thing I’ll try if this returns.

Delete Containers, Group Containers, and CloudKit Caches

In Finder, delete

/Users/yourname/Library/Containers/yourAppContainerFolder/
/Users/yourname/Library/Group Containers/yourGroupID.yourAppGroupContainerFolder/
/Users/yourname/Library/Caches/CloudKit/yourAppID
/Users/yourname/Library/Caches/CloudKit/CloudKitMetadata* (*all files that begin with that filename)
/Users/yourname/Library/Caches/CloudKit/CloudKitOperationInfo* (*all files that begin with that filename)

Now launch Activity Monitor.app and force quit the following processes:

cfprefsd
apsd
notifyd
remoted

Now, I’m not sure you need to force-quit each and every one of those, but I wanted to relaunch any process that remotely looked like it had to do with remote/push notifications.

At this point, I restarted Transloader through Xcode, and lo and behold, it worked again.
On my MacBook Pro, where the same problem occurred simultaneously, I took the same steps. And it *didn’t* work. A restart was required, so your mileage – like mine – may vary.

Additional Info

There’s also this handy technical note from Apple, which can help debugging push notifications on both macOS and iOS.

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For Transloader’s upcoming version 3.0, I needed an NSMenuItem that not only showed a title, but also a subtitle, along with an optional image.

Because it took a bit of work and “reverse-engineering” (the click-on-an-item-selection-animation’s timing, in particular), I figured someone else might benefit from this.

Where to get it / Sample Project

It’s all pretty straight forward, and best shown / explained as an Xcode project, which you can download on Github.
This is basically all you need to do:

Screenshot the sample project's source code

That’s it!

Caveats

There are some things this implementation can not do, which the default NSMenuItem can:

  • There is no type select
  • The arrow keys can’t be used to go through the items
  • You can’t activate items with the space or enter keys

Basically, keyboard interaction is unavailable.

I do hope it’s useful to you anyways.
If you’re using this, I’d love to hear from you! 😊

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