- (void)outlineView:(NSOutlineView *)outlineView willDisplayCell:(id)cell forTableColumn:(NSTableColumn *)tableColumn item:(id)item { NSCell * myCell = [tableColumn dataCellForRow:[outlineView rowForItem:item]]; [myCell setAllowsEditingTextAttributes: YES]; [myCell setSelectable: YES]; NSURL* theURL = [NSURL URLWithString:@"http://www.apple.com"]; NSMutableAttributedString * attr = [NSMutableAttributedString hyperlinkFromString:[myCell stringValue] withURL:theURL]; [myCell setAttributedStringValue:attr]; }