SomeView.swift

import Cocoa

class SomeView : NSView {
    var trackingArea : NSTrackingArea?
    
    override func draw(_ dirtyRect: NSRect) {
        NSColor.red.setFill()
        dirtyRect.fill()
    }
    
    override func updateTrackingAreas() {
        super.updateTrackingAreas()
        if trackingArea != nil {
            removeTrackingArea(trackingArea!)
        }
        let aTrackingArea = NSTrackingArea(rect: bounds, options: [.cursorUpdate, .activeAlways], owner: self, userInfo: nil)
        addTrackingArea(aTrackingArea)
        self.trackingArea = aTrackingArea
    }
    
    override func cursorUpdate(with event: NSEvent) {
        NSCursor.pointingHand.set()
    }
    
}