Determine the actual home directory URL from a sandboxed app

NSURL+ActualHomeDirectory.swift

extension NSURL {

    /// A URL identifying the user's home directory, typically in `/Users`.
    ///
    /// Calling `NSHomeDirectory()` from a sandboxed app will return an descendant of the app sandbox.
    /// This property on the other hand will return the actual home directory outside the sandbox.
    /// Note that access restrictions still apply, e.g. testing access to the returned URL will normally fail.
    static var actualHomeDirectoryURL: NSURL? {
        let pw = getpwuid(getuid())
        return NSURL(fileURLWithFileSystemRepresentation: pw.memory.pw_dir, isDirectory: true, relativeToURL: nil)
    }
}