public func launchAndGetText(path: String, args: [String]) -> String {
    let ps = Process()
    let psStdOut = Pipe()
    ps.launchPath = path
    ps.arguments = args
    ps.standardOutput = psStdOut
    ps.launch()
    ps.waitUntilExit()
    let psData = psStdOut.fileHandleForReading.readDataToEndOfFile()
    let psText = String(data: psData, encoding: String.Encoding.utf8)
    return psText ?? ""
}

let hwinfo = launchAndGetText(path:"/usr/sbin/system_profiler",
                              args: ["SPHardwareDataType"])