I'm running v6.8 on a mac (OSX 10.9.5) and TLC just started freezing the day after I upgraded to osx 10.9.5. I tried reloading both TLC and my OS to no avail. Finally, I restored back to before it started freezing (but after the os upgrade) and that fixed it. . . for a day! I even bought a new macbook pro and repurchased TLC. Worked for a day then freeze, freeze, freeze. Anyone else having this issue?