How to change NSTextField background color in NSPopOver

Question

Mac OSX 10.10 Xcode 6.1

I created a tableview in NSPopOver. I try to

Answer 1

There's a known bug with text fields and the "vibrancy" blending added in Yosemite. It's known to affect popovers.

The workaround is to set the appearance property of the table view to NSAppearanceNameAqua.

This was confirmed by an Apple engineer in their devforums.

2019-05-09 EDIT:

This issue also sometimes affects NSTextFields that appear on popovers where the background is grey. Here's the Swift 5 fix, add this to the viewDidLoad() function of your popover controller

self.someTextField.appearance = NSAppearance.init(named: .aqua)