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
        let owner = w[kCGWindowOwnerName as String] as? String ?? "?"
        let name = w[kCGWindowName as String] as? String ?? ""
        let b = w[kCGWindowBounds as String] as? [String: CGFloat] ?? [:]
        let layer = w[kCGWindowLayer as String] as? Int ?? -1
        if layer == 0 {
            print("pid=\(pid) owner=\(owner) name='\(name)' bounds=\(b)")
        }
    }
}