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Print Administrator/Image Capture issue

Whenever I log in to an account that does not have admin rights on my iMac running Lion, the following message appears: "Image Capture Extension is trying to modify the printer settings. Type the name and password of a user in the 'Print Administrators' group to allow this." This began happening when I upgraded to Lion; it never occurred before.


I have experimented with adding and then removing admin rights from the non-admin accounts, but this only succeeds in removing the message for as long as admin rights apply. As soon as they're removed, the message starts to appear upon log-in again.


I can't find any information on a 'Print Administrators' group, so I don't know how to add these accounts to said group. I don't know what Image Capture Extension wants to do every time I log in that requires such authorization anyway.


Can anyone help?


Thanks in advance!


--Jan

Posted on Sep 7, 2011 6:55 AM

Reply
23 replies

Sep 13, 2011 9:08 PM in response to ammi

Image Capture Extension is a background service that runs on login. It was present with 10.6 and still present with 10.7. In testing I thought that the service would not start without a scanner/printer connected to the Mac. But after resetting the printing system to remove all devices from Print & Scan the service is still present, probably in case you connect another image peripheral such as a camera.


As to why your Mac's are requiring you to authenticate for this service to start is an unknown. With a standard user account, the service shows that account as being the owner - not the system or admin. So I'm not sure what happened with your Lion install.


Since there is a mention of the print administrators group, which is lpadmin, you could try adding the standard account to this group to see if that stops the message. Open Terminal and type;


dseditgroup -o edit -u admin_name -p -a user_name -t user _lpadmin


The command "dseditgroup" adds the user_name to a group (in this case, _lpadmin). And admin_name is the name of your administrator's account.

Jan 14, 2012 10:30 PM in response to Eric-S

To see the service on 10.7.2 I found that I needed to start Image Capture. This was not the case back in September when I posted the other reply, which I believe was 10.7.0. So don't know if 10.7.2 stopped this service from starting at login as I found then.


Anyway, with Image Capture open and the service running, a sample showed that it resides in;


/System/Library/Image Capture/Support/Image Capture Extension.app/Contents/MacOS/Image Capture


As to the ability to change via the GUI, you may be able to do this via Directory Utility, which resides in /System/Library/CoreServices, but I haven't tried it. The workaround I gave was originally based on this Apple KB article, but looking at the article now it shows that Apple has removed the Terminal information. Any reason why you would prefer to make the change via GUI?

Mar 5, 2012 1:07 PM in response to britomart

What I've found that seems to work so far in my limited testing (one machine only; I'll deploy it to my other machines today) is by opening the Get Info window for the app and changing the priveleges for the everyone group to Read & Write, as in the image attached. Yes, it's likely not a good idea, but it solved my problem and didn't touch printing.

User uploaded file

Mar 30, 2012 10:09 AM in response to Rusty Rat

What I have done so far:


  • Repair Permissions
  • Add users to lpadmin via dseditgroup
  • Change permissions on Image Capture Extension.app in \system\library\image capture\support to Read-Write
  • Delete al Image Capture plist files
  • NVRAM refresh (on advice from Apple)
  • Empty Cache
  • Reload Canon scanner software
  • Reload OS (on advice from Apple)


No change. The only thing tha makes this message go away is to change my user from standard to admin.


I wish I could find documentation on the complete removal of my scanner software as I'd like to try a fresh install while as a standard user. I installed it as an admin, hence (I believe) the origin of the problem.

Print Administrator/Image Capture issue

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