For trouble syncing contacts ior calendars: First, set the preference to overwrite the device from your mac and sync. Reset the prefs for two-way sync. Then got to: Home/Library/Application Support/PocketmacSyncManager/Additional Tools/DataPurgeUI Select the data that is not syncing (contacts or calendars) and click purge. This will erase that specific data from the device and leave the rest in tact. Sync again. A good test is to add data to the note field in a specific contact/appointment on the device and different data to the same contact/appt. on the computer. If, after syncing, all of the data appears on both devices, you know you're good. Be warned, this application is still totally unreliable, randomly failing to recognize the device even if it has not been disconnected between syncs.