Did you try setTitle_
?
def clicked_(self, notification):
self.menuItem.setTitle_("Clicked!")
or with a timer:
def finishLaunching(self):
# ...
self.timer = NSTimer.alloc().initWithFireDate_interval_target_selector_userInfo_repeats_(NSDate.date(), 1.0, self, 'tick:', None, True)
NSRunLoop.currentRunLoop().addTimer_forMode_(self.timer, NSDefaultRunLoopMode)
self.timer.fire()
def tick_(self, arg):
self.menuItem.setTitle_("Tick %d!" % int(time.time()))
For live updates you probably need JGMenuWindow (SO: How to update NSMenu while it's open?)