iPhoto will not recognize camera

Same issues as many here:
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1) iphoto won't recognize any of my 3 digicams (nikon d40x, canon sd600, canon 780is. Card reader won't "wake up" iphoto w/ any of the 3 cards either (2, 1, 8 GB respectively), although the 2 will show up in finder by using the card reader. All of these cameras/cards have been working flawlessly up until a week ago, when...

2) My Mac also stopped being able to print (even to pdf). I have to delete and re-add my bonjour HP printer EVERY time I want to print something.

I can only assume this has something to do w/ app software updates that aren't compatible w/ my OS (10.4.11). I may buy a copy of 10.5 (latest v my G5 imac can run) and see if that helps. It's a $150 test, but what else can you do?

Ok, so this is the same problem I'm having...more or less.
The fix is to bring up printer setup utilities and reset printing services.
But I have to do that all of the time.
The camera worked to bring up iPhoto after I did this, however.

I think this must be a software release that went wrong, or possibly a virus....

whoops - should have read more carefully.
I'm using Mozy backup.
This is caused by a Mozy backup bug.
See post above....

Here is the post....
http://discussions.apple.com/thread.jspa?threadID=2196203&tstart=30

I have the same result on my with a 2.8 Ghz Core 2 Duo running 10.6.2. When I took the same camera and USB cable upstairs and connected it to my daughters PowerPC based iMac, it worked like a charm. I can confirm that it is not the camera, the cable or the SD card. I also tried different USB ports on my Intel based iMac and the camera still did not work even while other USB devices worked.

Try trash the following file

com.apple.ImageCaptureNotifications.DeviceDiscoveryDatabase.501

from HD/Library/ Caches

and restart your mac.


Regards

TD

I'm having a very similar problem with multiple cameras (iPhone camera, Canon SD1000, Canon 5DmkII). It is not specifically the camera. When I plug them in, they show up in the System Profiler and IORegistryExplorer so it is not specifically a USB port. I've tried multiple cables anyway to no avail. I've used a card reader to mount at least the SDHC cards as mass storage and they show up fine.
Plugging in the same cameras with the same cables on my MacBook works fine. Uptime on my iMac which is having the problem is around two weeks now.
Generally, after a reboot, Image Capture works fine. I suspect there is some Digital Still Camera USB class service that is failing after enough uptime or conflicting app runs and while I've developed USB host and peripheral stacks for embedded OSes, I have very little knowledge or OSX 10.6.2 internals.
I really don't want to have to reboot every time I want to read images off of my cameras.

Success.

Following my hunch after my last post I ran "ps ax|fgrep -i camera" in the terminal to search for camera related processes.
It revealed that the following process was running:
/System/Library/Image Capture/Devices/PTPCamera.app/Contents/MacOS/PTPCamera -psn 09193668

I killed that process and re-launched "PTPCamera.app". Now the cameras show up fine. I hope this helps some of you. I'm not sure why the process went errant though.

Same problem, same solution. Nothing wrong with my cameras, nothing wrong with the SD cards, etc. The PTPCamera.app was hung.

I don't know how to run the terminal commands mentioned by matt68000 - I used Activity Monitor to kill the process and then rebooted. Problem solved.

same problem here. resetting printer services solved the iPhoto problem, yipee! Thanks.