How to set flat style to NSButton on NSToolbar (to look like NSToolbarItem). For instance, the last toolbar item in the figure (Pointer) should look like other toolbar items. Currently it has border ...

I am contributing to a project called CodeEdit, which is looking to make a code editor with a design similar to Xcode. In dark mode, I can't get the toolbar color to be the same as the toolbar in Xcod...

I am trying to put a TextField in the toolbar of my macOs app. However, the constraints I apply via .frame() do not seem to have any effect. Here is some the test code: ToolbarTestApp.swift import Swi...