10.2 No Playback After Update - solved

Question

HI
just in case anyone else gets this ... Had me stumped for a bit .
updated to Yosemite from Mavericks so I could use FCP 10.2. Among other things I also updated my Audio interface driver ( Apogee One ) and tested it it. Worked fine.
Updated FCP X along with ProVideo updates.
it launched fine and worked in all respects except it would play anything .! Hitting play gave a 3 sec. Beach ball then the app sat there . Nothing!nActivity Monitor showed FCP X using 100% CPU.
Messed around a lot ... permissions, prefs all that ... To no effect.
FInally I uninstalled and reinstalled the Apogee audio drivers  and all came good.
maybe this might help  if you are having a similar issue,
best

Answer 1

Download and reinstall OS X Yosemite 10.10.2 Combo Update if you upgraded an existing Yosemite system. Otherwise, do this:
Reinstalling OS X Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Reinstalling OS X Without Erasing the Drive
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility and press the Continue button. After Disk Utility loads select the Macintosh HD entry from the the left side list.  Click on the First Aid tab, then click on the Repair Disk button. If Disk Utility reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit Disk Utility and return to the main menu.
Reinstall OS X: Select Reinstall OS X and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.
Also see:
Reinstall OS X Without Erasing the Drive
Choose the version you have installed now:
OS X Yosemite- Reinstall OS X
     Note: You will need an active Internet connection. I suggest using Ethernet
                 if possible because it is three times faster than wireless.