Timecode problems

Hi,
I have had Cross for a while and it has ran great.
But last month my macbook was updated to Yosemite, and then when I went on Cross it would play for about 5 mins, then shut down and give me a problem message.
So i checked on here, updated my Cross to the latest version in the hope this would fix it.
I have just went on Cross and it happened again after 5 mins. When i play it through internal mode, not using TC, it works fine and doesn't shut down.
Anyone know what the problem may be?
Thanks
J
I have had Cross for a while and it has ran great.
But last month my macbook was updated to Yosemite, and then when I went on Cross it would play for about 5 mins, then shut down and give me a problem message.
So i checked on here, updated my Cross to the latest version in the hope this would fix it.
I have just went on Cross and it happened again after 5 mins. When i play it through internal mode, not using TC, it works fine and doesn't shut down.
Anyone know what the problem may be?
Thanks
J