Read the home directory in a sandboxed app by calling NSOpenPanel

ViewController.swift

import Cocoa
import Foundation

class ViewController: NSViewController {

    private func promptForWorkingDirectoryPermission() -> URL? {
        let openPanel = NSOpenPanel()
        openPanel.message = "Choose home directory"
        openPanel.prompt = "Choose"
        openPanel.allowedFileTypes = ["none"]
        openPanel.allowsOtherFileTypes = false
        openPanel.canChooseFiles = false
        openPanel.canChooseDirectories = true

        _ = openPanel.runModal()

        return openPanel.urls.first
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        let url = promptForWorkingDirectoryPermission()

        let fileManager = FileManager.default
        do {
            let contents = try fileManager.contentsOfDirectory(at: url!, includingPropertiesForKeys: nil)
            for content in contents {
                print(content)
            }
        } catch {
            print(error)
        }
    }
}