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How to correct: 'jpg file couldn't be opened because you don't have permission to view it'

Using a folder shared between a MacBook Pro (running OX 10.7.5) and an iMac (running OS 10.10.1).

The shared folder contains jpgs.  All of the jpgs are openable on the MBP but some are not openable on the iMac where they generate the error:  ''The file myfilename.jpg couldn't be opened because you don't have permission to view it'.  The other jpgs in the same shared folder open fine on the iMac.

Tried repairing disk permissions on both machines.  Didn't resolve the problem.

How to fix this?
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qeng
Asked:
qeng
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3 Solutions
 
MereteCommented:
How many are there could you email them?
Or upload to drop box and then they can download
https://www.dropbox.com/home

 To convert BMP image file to JPG use the " Preview" on Mac then go to File>export to desktop> select jpeg from the export as selection. Choose best quality and save.
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Eoin OSullivanConsultantCommented:
On the MBP (which can open ALL the images) .. select all the images in the folder (Command + A) and then bring up the Finder Info window (Command + I).
Check the bottom of the Info Window and you'll see the 'Sharing & Permissions' section .. you should probably change the permission to Read & Write for everyone .. and then at the bottom of the dialog .. press the cog icon and apply to any enclosed items (if you have any folders inside the folder).
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qengAuthor Commented:
Merete:  thanks for responding.  It was a permissions problem per eoino's comment.

eoinosullivan:  correct fix.  I had done that previously but inadvertently made the permission changes in a folder with the same name as the shared folder (in a different file directory) and didn't realize it.  Hence the files seen on the iMac were never getting new permissions applied.

Question:  how would I change the permissions on hundreds of images in a folder without having to change them one at at time?
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Eoin OSullivanConsultantCommented:
If you select the folder which contains ALL the images .. get info .. change the permissions on the folder and then in the same dialog .. press the small gear/cog icon and select "Apply to Enclosed" this will set the same permissions on the folder to ALL enclosed files.

Or if you select a large number of files .. (COMMAND + A) then only one Get Info dialog will appear for the batch of files and you can apply the permissions once only
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qengAuthor Commented:
Thx for getting back eoino,

When I follow the instructions in the 1st paragraph of your last comment, the option 'Apply to Enclosed' is greyed out.  I also notice that the padlock at the bottom of the Get Info window is also locked.  I'm able to change the permissions on the selected folder but those permissions aren't passed through to the enclosed folders (imagine a situation, for illustrative purposes, where someone had one folder per year, each containing one folder per month).

To the best of my knowledge, the user account I use on my MBP has admin privileges but I'm guessing there must be some config parameter I need to adjust somewhere which 'unlocks' the settings.

Any ideas?
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Eoin OSullivanConsultantCommented:
Click the LOCK icon to unlock the permissions and enter your admin password.  You should then be able to change the permissions
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qengAuthor Commented:
Thx for staying with me on this one eoino.  Seems obvious after the tip!
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