I fill the tracks array with the setter I typed just before (with the reloadData) and then I have the NSTableViewDataSource extension to set the number of lines : func numberOfRows(in tableView: NSTableView) -> Int {         if let tracks = tracks {             print("V&G_FW___numberOfRows : ", self, tracks.count)             return tracks.count         }         return 0     } And in the NSTableViewDelegate extension I just get the tracks array for each track : func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {         if let theTracks: [ITLibMediaItem] = tracks as? [ITLibMediaItem] {             let theItem = theTracks[row]             let cellIdentifier: String = "TracksListCellID"             var text: String = ""                          switch tableColumn?.identifier.rawValue {             case TableColumnID.trackNumberTableColumnID.rawValue:                 text = String(row + 1)             case TableColumnID.titleTableColumnID.rawValue:                 text = getTrackTitle(theTrack: theItem)             case TableColumnID.artistTableColumnID.rawValue:                 text = iTunesModel.getArtistName(theITTrack: theItem)             case TableColumnID.albumTableColumnID.rawValue:                 text = iTunesModel.getAlbumTitle(theITTrack: theItem)             case TableColumnID.locationTableColumnID.rawValue:                 text = theItem.location?.path ?? ""             case TableColumnID.totalTimeTableColumnID.rawValue:                 text = getTotalTime(theTrack: theItem)             default:                 text = ""             }                          if let cell: NSTableCellView = tableView.makeView(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: cellIdentifier), owner: nil) as? NSTableCellView {                 cell.textField!.stringValue = text                 return cell             }         }                  print("V&G_FW___viewFor tableColumn : ", self, "no TitleCellID is present !")                  return nil     } So classic code. My problem is I think I need to call the reloadData each time I delete an item in the TableView at the bottom to refresh the view... Right ?

Thx for your answer. I initialize the dataSource on the self (like often). After that I set the tracks with a setter and I reload the datas : `var tracks: [NSObject]? {         set {             datas = newValue             DispatchQueue.main.asyncAfter(deadline: .now() + 0.05) { [weak self] in                 self!.tracksListTableView.reloadData() // to avoid the init bug...             }         }         get {             if let tracks: [NSObject] = datas as? [NSObject] {                 return tracks             }             return nil         }     }` My bad but my project has 2 years old and I don't even remember how I plug the datas to the TableView... In the inspector ? Thx.