Did you call -reloadData after resizing the itemPrototype? You have to get the collection view to regenerate all the views with the newly resized prototype. - Jon

Oh right - well, there's the manual 'reloadData' method - set content to an empty array, then back to your content array :-/ - Jon

Is the 'window' outlet of the XIB file's owner set to point to the window in the XIB? It doesn't sound like it. - Jon

Glad that fixed it! When you create a new source file for a class that's derived from NSWindowController, Xcode will offer to make the class files as well as a XIB file (all wired up) for you. Unfortu

Couldn't you just make it: static id instance; instead? - Jon

No no - not: static id *instance; but static id instance; The id type is itself a pointer to an object. - Jon

Note that the IORegisterForSystemPower callback doesn't get called for wake/sleep cycles in Power Nap mode. That doesn't make sense to me, but when I filed a bug about it, Apple closed it with "behave

I've always just converted the entire dictionary and its contents to mutable objects. I've included some code below for the necessary categories to implement "mutableCopyDeep" methods. It does a deep

Not knowing how your code is structured, this may be a dumb question, but just to check: Are you certain that you're not creating multiple timers somehow? I've mistakenly done this when creating timer

And that the block isn't being deallocated prematurely somehow. - Jon

You can use the Service Management framework to add items to open at login (though they don't appear in System Preferences > Users & Groups > Login Items, which is a pet peeve of mine). See this answe

I think you may be trying too hard. NSAlert should show a badged copy of your application icon if you just leave it set to its defaults (don't set an icon at all). - Jon

Try putting this after your orderFront call: [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:0.01]]; The runloop basically has to do at least one iteration before the new

Hmph - now that you mention it, there's no current runloop at that point - the app is still launching. So [NSRunloop currentRunLoop] is probably returning nil. You could grabbing mainRunLoop and runni

See NSWindow.frameAutosaveName. That should take care of it for you. - Jon

[NSImage drawInRect:...] won't do it. NSImageView will render template images correctly, if you can somehow add one to your control, or you can use one of the methods discussed here: https://stackover

As Quincey said, it looks like you've got a zombie pointer that's now pointing to an NSWindowGraphicsContext instead of the original, now-deallocated NSSnapshotBitmapGraphicsContext. Turn on zombie ob

Oh - here you go. It's in the scheme's Run > Diagnostics tab even back in Xcode 6: https://code.tutsplus.com/tutorials/what-is-exc_bad_access-and-how-to-debug-it--cms-24544 - Jon

Well, its class is NSPanel rather than NSWindow - is it sufficient to just hide / show all NSPanels in the app's window list when you're deactivated / activated? Alternately, you can look at all NSPan

In Obj-C (getting width and height of an image in pixels): NSMetadataItem *mdItem = [[NSMetadataItem alloc] initWithURL:url]; NSDictionary *dict = [mdItem valuesForAttributes:@[NSMetadataItemPixelWidt