import Cocoa
let opts: CGWindowListOption = [.optionOnScreenOnly, .excludeDesktopElements]
if let list = CGWindowListCopyWindowInfo(opts, kCGNullWindowID) as? [[String: Any]] {
    for w in list {
        let pid = w[kCGWindowOwnerPID as String] as? Int ?? -1
        if pid == 1668 || pid == ProcessInfo.processInfo.processIdentifier {
            let b = w[kCGWindowBounds as String] as? [String: CGFloat] ?? [:]
            let name = w[kCGWindowName as String] as? String ?? ""
            let layer = w[kCGWindowLayer as String] as? Int ?? -1
            let alpha = w[kCGWindowAlpha as String] as? Double ?? -1
            print("pid=\(pid) layer=\(layer) alpha=\(alpha) name='\(name)' bounds=\(b)")
        }
    }
}