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Switcher Hangout The place for switchers to discuss their new machines, and how to work with OS X. General support can be had here for newbie stuff, like "How do I restart my new iMac?" :)

Apps for different users - permissions


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gadgetfreak

 
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I installed a program called alphababy (reviewed in MacWorld) to let my 3 year old play on his restricted account. Using the parental controls, I checked off the program on his account - like I did with other programs). But, it will not show up in his applications. I confirmed it was checked. It also is not working in my 6-year-old's restricted account either.

Why would this program not work?
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D3v1L80Y

 
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What parental controls are you using? Are you using the built in ones with OS X or are you using a third-party application for the parental control?

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gadgetfreak

 
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I am using the built-in parental controls.
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If you're familiar with Unix you could just set permissions for various files.

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gadgetfreak

 
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Unfortunately, I am not familiar with Unix and I am brand new to the Mac. I just don't understand why the built in permissions work for some apps but not others. Can anyone help me? Thanks.
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Slokunshialgo

 
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Not sure how much this will help, but here's a (quick) rundown on Unix permissions (Note, I can't do anything Mac-specific yet, as I'm still waiting for mine to come in):

Every file is owned by both a user, and a group, usually following the idea of "admin.root" where "admin" is the user, and "root" is the group. To change this, use the "chown <user>.<group> <file/folder>" from command line. The user specified does not have to belong to the specified group.

Next, we have permissions:

All files & folders have permissions for the user who owns it, the group it belongs to, and everyone else. (See above for user & group) In these sets, we have 3 types: read, write, execute.

Code:
User               | Group              | Others
Read Write Execute | Read Write Execute | Read Write Execute
The command to change these is "chmod <permissions> <file/folder>".

Now, here, the permissions part of the command gts a wee bit complex, but here's a simple breakdown:
"chmod 755 file.ext" would be changing the permissions of "file.ext" to User can read, write, execute (rwx), group is read and execute (r-x), and others can read & execute (r-x).

To make the rest of this clear, this would therefore follow the pattern of:
rwxr-xr-x

if you notice, there are 3 settings for the 3 groups, therefore 9 options total, as there would be 9 letters in the pattern above (hyphens mean that that user cannot do the specified action).

Now, with the 3 numbers in the 755, here is the breakdown (If you know binary, it makes it a lot easier to understand):
Remember that these are all following the idea of rwx
Code:
0 ---
1 --x
2 -w-
3 -wx
4 r--
5 r-x
6 rw-
7 rwx
Now, remember that for nearly any command, you should be able to read the man page on it ("man <command in question>") which will go into more detail, and give you more options for them.

I hope this makes sense. If it doesn't just ask me about it.

Oh, and I hope that none of the Unix-knowing people here comment on my technical omissions (ie: Directory instead of folder, and that directories are, technically, files)

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Quote:
Originally Posted by gadgetfreak View Post
I installed a program called alphababy (reviewed in MacWorld) to let my 3 year old play on his restricted account. Using the parental controls, I checked off the program on his account - like I did with other programs). But, it will not show up in his applications. I confirmed it was checked. It also is not working in my 6-year-old's restricted account either.

Why would this program not work?
What do you mean, "show up in his applications?"

There is the main applications folder, in /Applications, and then there is the user's applications folder, in /Users/username/Applications, and then there's the Dock.

If an app is in /Applications, anyone can see it; but you can only run it if you're not restricted, or if you are restricted but it's checked off.

If an app is in /Users/username/Applications, then only username can run it. It's theirs only.

Applications from either folder can be put in the Dock, so long as the user is allowed to modify the dock. (There's a box for that, too.)
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