def _performAction(self, action):
try:<EOL><INDENT>_a11y.AXUIElement._performAction(self, '<STR_LIT>' % action)<EOL><DEDENT>except _a11y.ErrorUnsupported as e:<EOL><INDENT>sierra_ver = '<STR_LIT>'<EOL>if mac_ver()[<NUM_LIT:0>] < sierra_ver:<EOL><INDENT>raise e<EOL><DEDENT>else:<EOL><INDENT>pass<EOL><DEDENT><DEDENT>
Perform the specified action.