AutoGrowingTextField.swift

import Cocoa

class AutoGrowingTextField: NSTextField {
    
    override var intrinsicContentSize: NSSize {
        let size = super.intrinsicContentSize
        var r = frame
        r.size.height = 10000
        if let h = cell?.cellSize(forBounds: r).height {
            return NSSize(width: size.width, height: h)
        } else {
            return size
        }
    }
}