Discussion in 'Mac Help/Tips' started by Schiffi, May 25, 2003.

  1. Schiffi macrumors 6502a


    May 22, 2003
    Well, could someone explain to me what Permissions are. I just repaired mine, and it found lots of ones that needed to be fixed, Soandso needed to be 0, was 105 and that whole spiel.
  2. MacsRgr8 macrumors 604


    Sep 8, 2002
    The Netherlands
    All files/folders/apps have user rights and permissions on Mac OS X.
    There are 3 types of "persons"(user belonging to a file):
    1. Owner.
    2. Group.
    3. Everyone.

    There are 3 types of permissions:
    1. Read
    2. Write
    3. Execute
    note: combinations are possible.

    All users belong to a group. So, if "Schiffi" is a "MacRumors"-group member and "MacsRgr8" is also a member of the group "MacRumors" and you have personally made a file "test.txt" then here are some possibilities.
    1. You have read and write privileges as you are the "owner". The "group" you belong to has only read permissions. So, MacsRgr8 is allowed to read the file, but not make changes. "Everyone" has no access, so nobody else can have access to it, can't even read it.
    2. Schiffi has made it a small executable program. You want to be the only one able to change the script, but everyone else is allowed to use your handy application.
    What will the permissions be?

    Owner (Schiffi): read/write/execute.
    Group (MacRumors, including MacsRgr8): execute
    Everyone (rest of world): execute.

    Your whole HD is filled with (system-)files with all kinds of permissions.
    Somehow these permissions get mixed up after installing specific software, and it is good advice to repair disk permissions after every OS - update.

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