I am using my EX3 for 4 years now, and I am having the first issue: Last week I connected the camera to my MacPro by USB cable (as I was always doing) but the camera, rather the cards in the camera are not recognized by computer. Cards are OK, as I tried transfer via my MacBok Pro and it works as usual. So the problem is not related to the cards, but obviously to camera - computer connection.
Any idea what can I do to fix this issue?
Thanks,
Daniel

Do basic troubleshooting.
1 - Try a different cable. This is hopefully the issue.
2 - See if a different computer will recognize the camera
3 - See if your computer recognizes a different camera

Dave,

Did all three steps. To no avail. Tried to connect camera to three other computers, both Mac and PC - no luck. Computer recognizes my Canon DSLR.

No, it is camera.

Did you use the keyboard USB port on your Mac Pro? If so, try one of the ports on the computer itself and see if that works...

No, I used proper input, and tried on three other computers. I was downloading the rushes same way for more then 3 years, and it does not wok no, all of a sudden. Is it possible that setup was changed? Then again, I executed factory reset, which did not help either. I was actually hoping something went wrong with the camera setup.... Perhaps wishful thinking. I suspect that input connector got bad. Is it possible?

Very strange. The camera was not in 'play' mode while you made the connection? Otherwise I have no clue...

camera is set to play, naturally. Is there some inexpensive SxS card reader I can buy? Found only Sony reader - writer but it seems darn costly at 350$ in States. Anyone knows of cheaper reader?

It's an outside shot but I've had problems with USB devices out of the blue. For me it was a keyboard that was causing the problem on the USB buss. Disconnecting ALL USB devices except the EX1 may show you the camera is just fine. Also, the Apple System Profiler (Apple Menu -> About this Mac -> More Info) may show if the underlying hardware is seeing the camera.

Tried it - no luck. As I said, I tried to connect the camera to 3 other computers with the same result, so it is not computer.

I have the Sony SxS reader and am glad. In the field, it can be powered by OEM camera batteries that use the EX-1 power jack. Being USB, it will still be useful for mobile applications when my laptop dies. I think there's a Thunderbolt SxS reader as well made by someone else.