Can't make it work. Set up so both Mac computer and Samsung S7 phone are on the same wi-fi system. Turn on Airdroid Mac 3.5 and Airdroid for Android 4. on phone. Phone DOES NOT appear in "my devices" list on computer. Period. It DOES appear in "preferences", as a trusted device. Meanwhile, nothing can be sent to the computer. I have used Airdroid successfully in the past; not any more, since I upgraded the computer version to 4.0. Got any ideas?