The sync feature hasn't been changed with our latest Mac update. It should still be working like before.
Please note that it is dependent on a correct BPM and Beat-Grid detection by djay. For some tracks this might be going wrong. We implemented ways to manually help yourself though.
Please try the following: 1. Manually assign the BPM by using the "TAP" function (you can access by clicking on the BPM value) 2. Manually assign the Beat-Grid at the Waveform View. Therefore, move the Red Line to the first bar of the beat and click on "SET GRID"