官方文档:
Why I can't connect to MikroTik 802.11n AP with Apple Mac devices?
This problem is only seen on Mac devices based on Broadcom wireless chipsets. In order to connect with such wireless device to MikroTik 802.11n AP make sure that you don't use 'short' preamble-mode. Use 'long' or 'both' preamble-mode and Mac wireless devices will be able to connect.