Show folder's contents in finder using Swift

Use the selectFile method and pass nil as first argument and the path to the folder to be shown as second argument.

NSWorkspace.shared.selectFile(nil, inFileViewerRootedAtPath: "/Users/")

2020 | SWIFT 5.1:

func showInFinder(url: URL?) {
    guard let url = url else { return }
    
    if url.isDirectory {
        NSWorkspace.shared.selectFile(nil, inFileViewerRootedAtPath: url.path)
    }
    else {
        showInFinderAndSelectLastComponent(of: url)
    }
}

func showInFinderAndSelectLastComponent(of url: URL) {
    NSWorkspace.shared.activateFileViewerSelecting([url])
}

showInFinder:

• Folder's url = will show in Finder content of the folder.

• File's url = will open in Finder file's parent and select file there.

• Url is nil = Will do nothing

• File/path does not exist = Will do nothing

Swift 2.1 code to Launch OS X Finder

Use the selectFile or activateFileViewerSelectingURLs to select files.

Select 1 item in finder with path YOUR_PATH_STRING

NSWorkspace.sharedWorkspace().selectFile(YOUR_PATH_STRING, inFileViewerRootedAtPath: "")

The second param use empty string, if you specify an empty string "" for this parameter, the file is selected in the main viewer.

---

If you want to select 1 or more files use activateFileViewerSelectingURLs(_ fileURLs: [NSURL])

To select one file

NSWorkspace.sharedWorkspace().activateFileViewerSelectingURLs([NSURL].init(arrayLiteral: NSURL.init(fileURLWithPath: YOUR_PATH_STRING)))

To select multiple files

let urls : [NSURL] = [NSURL.init(fileURLWithPath: "/Users/USER_NAME/Pictures"),
                      NSURL.init(fileURLWithPath: "/Users/USER_NAME/Music")]

If you provide item that are not in the same folder more windows selecting the specified files are open.

let urls : [NSURL] = [NSURL.init(fileURLWithPath: "/Users/USER_NAME/Pictures"),
                      NSURL.init(fileURLWithPath: "/Users/USER_NAME/Music"),
                      NSURL.init(fileURLWithPath: "/Users")]