I'm on OS 10.12.1, TM2 (12.26) and Skim 1.4.22 as viewer. Syncing pdf to source works, but not source to pdf. I looked at Skim's user list but couldn't find a solution. I wonder if something has to be done to the LaTeX bundle to restore this ability? Or is it an Apple 10.12 problem and I should wait for an Apple fix.... --Gildas