Confusion over permissions authentication in Get Info...

Hi,
It just occurred to me I've never satisfied myself as to why, when attempting to alter the permissions on a file or folder that the current user owns and has read/write privileges to, it is necessary to authenticate using an Admin username and password to perform any changes to said permissions.
For example, I currently have the Get Info... window on a folder with the following permissions:
Me - RW & Owner
Admin user - Read only
Admin Group - Read only
Everyone - No Access
The parent folder has the same permissions. Why, then, are all the sharing and permissions buttons greyed out and inaccessible until I authenticate as an Admin user?
Another example: my Desktop folder has the permissions:
Me - RW & Owner
everyone - No Access
I am allowed to add new users, but if I do so (in this case an admin user, just for the purposes of testing) then the option to Apply to Enclosed Items... remains greyed out until I authenticate as an Admin user. Why?
More of a niggle than a complaint, but I would like to be enlightened on this. Complex answers welcome.
S.

pzeitler, i tried your fix. it worked but only partly. i had to go to an admin account and do the sudo because my non-admin account that was affected does not allow me to sudo from it. so i do it from admin account and it seems i add my non-admin user to all admin files\folders with full permissions and no admin account user. so i open the home folder in get info, add admin user and set permission, apply recursively to all inside it. How ever, i couldnt remove the non-admin user from admin user folder permissions.
now i go to non-admin user account and find that unknown grp is gone for all except three folders (public/sites/downloads). i also checked a third, non-admin user and it seems unaffected by all the operations that i have performed. but it has the unknown grp in it.
I guess i have to wait for apple to fix it rather than mess up the system myself.

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unknown user appears in get info permissions list of a lot of folders. I cant remove the user, change the permission level of that user. Is there a way of getting over this problem?
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http://i228.photobucket.com/albums/ee151/cosmac2007/Picture5.png

pzeitler, i tried your fix. it worked but only partly. i had to go to an admin account and do the sudo because my non-admin account that was affected does not allow me to sudo from it. so i do it from admin account and it seems i add my non-admin user to all admin files\folders with full permissions and no admin account user. so i open the home folder in get info, add admin user and set permission, apply recursively to all inside it. How ever, i couldnt remove the non-admin user from admin user folder permissions.
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Maybe that description was a bit convoluted. Let me see if I can draw it out --
OD Server   <===bound===> ldap client #1 <--user #A, GID=104020
    #1                                          OS X
                                                        |
                                                       |_______ file1,UID=user #B,GID=104020, perms 750
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                                                   volname
                                                       |   NFS
                                                       |
OD Server   <===bound===> ldap client #2 <--user #B, GID=104020
     #2                                       CentOS 6.3
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pzeitler, i tried your fix. it worked but only partly. i had to go to an admin account and do the sudo because my non-admin account that was affected does not allow me to sudo from it. so i do it from admin account and it seems i add my non-admin user to all admin files\folders with full permissions and no admin account user. so i open the home folder in get info, add admin user and set permission, apply recursively to all inside it. How ever, i couldnt remove the non-admin user from admin user folder permissions.
now i go to non-admin user account and find that unknown grp is gone for all except three folders (public/sites/downloads). i also checked a third, non-admin user and it seems unaffected by all the operations that i have performed. but it has the unknown grp in it.
I guess i have to wait for apple to fix it rather than mess up the system myself.

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I have this massage every time close ps cc
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You may get better help in Photoshop General Discussion
The Cloud forum is not about using individual programs
The Cloud forum is about the Cloud as a delivery & install process
If you will start at the Forums Index https://forums.adobe.com/welcome
You will be able to select a forum for the specific Adobe product(s) you use
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Mac 10.9.3 workaround https://forums.adobe.com/thread/1489922
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How full is the HDD?
At this point I think you should get Applejack...
http://www.versiontracker.com/dyn/moreinfo/macosx/19596
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applejack AUTO
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The "ignore ownership" box in the Finder's Info window completely disables local POSIX and ACL permissions, making the affected volume act like a removable disk. (Any user assumes POSIX ownership of the volume with full control.)
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--Gerrit

Confusion over permissions authentication in Get Info...

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