On MacOS 10.13 we could display an NSPanel from within SFSafariExtensionHandler as follows:func showPanel(_ message:String) -> NSPanel {
let panel:NSPanel = NSPanel()
panel.level = .floating
var frame:NSRect = panel.frame
frame.size = NSSize(width: 400, height:60)
panel.setFrame(frame, display: true)
panel.makeKeyAndOrderFront(panel)
let font:NSFont = NSFont.systemFont(ofSize: 20)
let attributes:[NSAttributedString.Key:Any] = [NSAttributedString.Key.font:font]
let attributedString:NSAttributedString = NSAttributedString(string: message, attributes:attributes)
let textField:NSTextField = NSTextField(labelWithAttributedString: attributedString)
panel.contentView = textField
panel.center()
let application:NSApplication = NSApplication.shared
application.activate(ignoringOtherApps: true)
return panel
}However, on MacOS Mojave 10.14 this no longer works. Instead we receive within the Console the following message:warning: attempt to begin free window rendezvous for <NSPanel: 0x600002767100> failed due to
Error Domain=com.apple.ViewBridge Code=10 "(null)"
UserInfo={com.apple.ViewBridge.error.hint=no host-and-service pairs,
com.apple.ViewBridge.error.description=NSViewBridgeEntitlementError}Anyone knows how to display NSPanel (or NSWindow) from within a Safari App Extension?