I updated my m5 with the new akira firmware so i could use the new time lapse function, i did this with my macbook pro, which i had to update the operating system in order to use the latest version of the app which took hours. all this because i didn't want to have to buy the wifi unit, i thought my macbook will do it all. turns out that you don't get the same GUI (graphical user interface ) on the laptop app as you do on the mobile app. so setting up the time-lapse feature on a laptop is way more difficult and you don't get the same ease of use as the mobile app. another reason not to buy the wifi adapter was that you could not use it to update the firmware anyway. It would seem whatever you pick you have to compromise, "mobile apps you can't update firmware" or "laptop app you don't get the nice interface" If i am wrong someone please let me know. Guess i better order a wifi adapter!! very frustrated.