Same with me. Obviously there are too many rejects with this exact reason. Let's hope that Apple will finaly realise the mistake they made. Which reminds me that they have several brutal problems in macOS and they are doing nothing to resolve any of them.
1. Problem No 1
NSToolbarItem (<NSToolbarItem: 0x6080001250a0>) had to adjust the size of <NSPopUpButton: 0x610000163900> from {40, 25} to the expected size of {42, 27}. Make sure that this toolbar item view has a valid frame/min/max size. This is an app bug, please do not file a bug against AppKit or NSToolbar! Break on _NSToolbarAdjustedBorderedControlSizeBreakpoint
This is the message you will away get when using NSToolbar with something changed in the initial configuration of the object, provided by Xcode - no matter what.
2. Problem No 2. The selected item sign in the NSMenu object in NSPopUpButton is not visualised like it should if the font used is system thin / light. If the weight is regular the sign is OK.
3. The autolayer issue:
[Layout] Detected missing constraints for <NSSplitView: 0x61000073cde0>. It cannot be placed because there are not enough constraints to fully define the size and origin. Add the missing constraints, or set translatesAutoresizingMaskIntoConstraints=YES and constraints will be generated for you. If this view is laid out manually on macOS 10.12 and later, you may choose to not call [super layout] from your override. Set a breakpoint on DETECTED_MISSING_CONSTRAINTS to debug. This error will only be logged once.
I don't even want to begin with this ...
I have fired bugs for 2 and 3 - nothing happened. There are several versions of macOS released since this problems appear - nothing is changed - the issues still exist.
Meanwhile it's really difficult to work with Xcode. Almost impossible. iTunesConnect is behaving like AI ... and in this aspect performs even better than M$ Window. There are basic features missing for Mac App Store, but present for the iOS version ...
I don't know what is happening but let's hope that things will get better soon.
I. Nikolov