The application Finder.app can't be opened.

Restarting the Time Capsule did NOT fix the issue the 2nd time that it happened today. Really thought I might be onto something. At least something less destructive than having to do a hard restart.

I'm really frustrated with this. It shouldn't happen multiple times a day.

i have the exact same situation.
thanks

I'm having this issue too and it's annoying me - I read through this thread and here's my fix that resolved the issue:

- Unplug my external device mounted via FireWire

I wonder if it's an hardware issue for me though, I did send my iMac back to Apple to get a dead on arrival FireWire port fixed.

nuY wrote:
- Unplug my external device mounted via FireWire

Yes, it works (when the problem is related to a firewire hd)…but when I did that last time I lost the contents of my external drive...

I just got the same problem and find this active and super high building with more than one-year history. 🙂

Unplug external drives solves my problem, though I'm worried about any data loss. It seems finder would be stuck when any file transfer issue happens on an external drive.

This problem has been plaguing me since I upgraded to 10.6...I have a Lacie 5Big NAS that was serving as Time Machine backups, and storage of my large music and video library. Ever since upgrading to 10.6 it has not worked nearly as well...

It is touch and go. I thought it was the NAS's problem, but back-and-forth with Lacie determined that it was an OSX problem...as more and more Macs are integrated into networks, and as they become more and more dependent on network shares of all kinds...I'd hope that the core app that Finder is would be more stable when dealing with this kind of equipment....

I also suffered the dreaded error -10810 when waking my Mac Mini from sleep. I have a WD World Book connected via Firewire 800 to my Mini which I count not access. Also failed to open iTunes returning error about me not having rights to access file.

After disconnecting WD World Book from Mac Mini and powering it off, I then reconnected it to Mini and powered it on again. Relaunching iTunes was fine one again and Finder application started working again too.

Here is what fixed the problem for me so far (3 days still going strong)...

Opened iTunes preferences and went to Advanced tab. Noticed that the iTunes Media Folder location was blank. So hit Reset button. Followed prompts and have since not suffered -10810 error.

Not to put your hopes down, but I haven't encountered the problem in weeks…and several days passed after each instance…

My itunes media folder is correctly selected, anyway.

This happens to me fairly frequently. It's always related to time machine and my external (FW 800) disks. I just tell time machine to stop and turn off my external disks and a few second later, the finder magically auto-starts and all is well again. I've noticed that it's much more likely to happen when the disks haven been idle for a while. They spin down when idle and I think sometimes, they fail to spin back up when Time Machine wants to use them, and that's what kills everything.

Just happened again. 😟

No external or network disks connected today, everything started when toast crashed while starting a conversion to iso, leaving the (empty) iso file there. Trying to move the file to the trash (to make up some space and try again) had no effect (only a "preparing" window, that became "canceling" after clicking on the "x". Trying again produced a second sheet under the first, and so on.

rm via shell hanged.

On relaunch toast hanged immediately.

I managed to relaunch toast the first time, force-quitted the finder and got 1080. Opened the finder using screen, tried to move the file to the trash and…toast, which was ready until then, hanged again!

I was going to reboot after writing this post, however everything solved by itself in those few minutes…:-/

I get this also. The application Finder can't be opened -10810. Disk utility hangs at this time also. Forcing it to quit hangs at the "click report to send a report to Apple". Starting finder from a terminal results in nothing.

This is definitely a serious bug with external drives, probably with sleep mode. It is a crime against our shared environment for Apple to have so many difficulties with sleep mode. I think computers should indeed sleep, and am reluctant to try avoiding the problem by eliminating sleep.

It happens it happens and it happens to me!
I blamed the iscsi disk created on my Qnap nisk.
I erase, deleted destroyed the iscsi.
Running easy normal simple plain charing environment on Qnap with iTunes.

Finder slows until it hangs. Then the error again and again and again.
After so many years of this bug this is really shocking!!!!!

Okay first off, I don't know much about my macbook (aka not a computer whiz) so a lot of these responses confuse me haha

I just had a system update for imovie and itunes and everything installed just fine, i went to turn off my mac cause i haven't shut it completely down in a while and i like to do that from time to time. The top menu bar went away but my dock still appeared, i thought it was just going slow so i didn't think anything off it, then after about 5 minutes i just shut my macbook and thought it would just turn off, i opened it back up and the same screen appeared (the top menu bar missing but my dock still there) i clicked the finder app on my dock and got the message "The application Finder can't be opened. -10810" i then opened up firefox and googled that message and was directed to this thread. Also, when i opened firefox my top menu bar reappeared so i tried to shut down once again and i got the same results, the top menu bar going away with only the dock showing. I then reopened firefox, and then tried to open the folder "documents" from my dock and then i got the same error message as before (The application Finder can't be opened. -10810) and the same when i tried opening the folder "downloads" from the dock

this is very frustrating and i really have no idea what i'm doing so any advice would be very appreciated

Same problem, had it once before 9 months ago. Solved it by formatting and reinstalling everything. Only restoring my files from backup, no applications.

This time I tried to format and recover from backup, and it just brought the problem back with it. Starts with my finder stops working, (usually about 5 minutes of using the computer). I can't ecject my CDroom, disk utility stops working, force quit applications stop working, and mostly all applications can't be opened, just get that error "can't be opened." or just "not responding".

Solution?
None have worked for me except formatting and reinstalling everything.

Same issue with a new iMac purchased in October '10.

In my case, it is caused by connecting an external iomega hard disk (ntfs). I first tried copying some files off it in finder, and it failed with this error. I encountered this error sporadically even when simply looking at files on the drive in finder.

Later, I tried avoiding finder after a clean boot and using a bash shell (terminal) to manually copy files from the drive. With this method, I was able to copy gigs of files without an issue. However, accessing the drive in other ways seems to cause the error 10810...

This is a horrible problem, and really angers me. This is my first mac and I am a former software developer.