Connecting to an SSID without provding password

Discussion in 'macOS' started by macmacmacr, Mar 19, 2017.

?

Does your Macbook pro connect even though the SSID password is removed?

  1. yes

    33.3%
  2. no

    66.7%
  1. macmacmacr macrumors member

    Joined:
    Dec 23, 2014
    #1
    I am running Yosemite and my Macbook pro is able to connect to an SSID without me providing a password. I deleted /Library/preferences/SystemConfiguration/ folder which should clear all of my WIFI preferences. When I checked, it did clear all my preferred SSID's information. I connected to a password protected SSID which I connected to before expecting no connection and the Macbook pro connected without me providing a SSID Password and having no information in my "Preferred networks".

    Can anyone tell me how to determine where it is getting the WiFI password? This issue should not occur as any Macbook Pro could be directed to connect to any wifi.
     
  2. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #2
    Did you remember to both remove your favorite networks, if they still exist in the Preferred Networks box.
    Also, un-check the box "Remember Networks this computer has joined".

    Any network logins are stored in iCloud, and the system, both used by Keychain Access.

    You can look up your network name in your Keychain Access app.
    Any network that you have connected should be listed there, along with the password. You can simply delete individual network entries.
    The next time you connect, the network should need new login information.
    (There's probably a step to remove that login from your iCloud keychain, but I don't know how to do that)

    Bottom line - your system (and your iCloud) keeps track of login information, because you have provided that information previously. It doesn't share that information to anyone else - (no one else connects, if there is no previous connection.
    So, you are safe from connecting to other, random, secured wifi networks. (And YOUR protected wifi network does not allow no-password access, either)
     
  3. komatsu macrumors 6502

    Joined:
    Sep 19, 2010
    #3
    And even for users not using iCloud - a completely formatted MacBook will still connect to an SSID because wireless passwords are also stored on the NVRAM chip of the MB.
     
  4. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #4
    I don't believe that wifi passwords are stored in NVRAM, other than one time to connect (which would not indicate that it is stored in NVRAM, either)
    Do you have a reference or source that lists anything about that?

    However, even if that is true, then you could clear that with a simple NVRAM/PRAM reset, correct?
     
  5. komatsu macrumors 6502

    Joined:
    Sep 19, 2010
    #5
  6. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #6
    Erm..
    That really only shows a guess (by one person) about where wireless passwords might be retained. Nothing definitive about NVRAM there, although it sounds reasonable, even if not factual.
    I have googled this before, and have not found any information about that. Not that the info does not exist, but I just haven't found the right way to search for it.
    So, until I see something that is just a little more solid, NVRAM ain't it (IMHO, for what it's worth)
     
  7. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #7
    If you have previously used Internet recovery and entered the wifi password during that process, it is true that password will be saved in NVRAM for the next time you use Internet recovery (command-option-r), but that password is not made available to the OS for logging in to that same wifi network like OP is experiencing.

    Sounds like OP has iCloud Keychain sync on and the password is coming back over from another device.
     
  8. macmacmacr thread starter macrumors member

    Joined:
    Dec 23, 2014
    #8
    I believe that the Macboo pro is somehow directly accessing the keychain information. The WIFI password still existed in the key chain but I do not understand what is referring to the value sinvce the network preference infomration have been cleared.
    --- Post Merged, Mar 20, 2017 ---
    I have also noticed another problem when deleteing the first SSID entered. When I try to delete the first SSID entered after clearing /Library/preferences/SystemConfiguration/ folder I get an error message "Preference erros" "There was an error in the network preference"
     
  9. macmacmacr thread starter macrumors member

    Joined:
    Dec 23, 2014
    #9
    If I have deleted the /Library/preferences/SystemConfiguration/ folder and I also tried to delete the specific SSID key but it kept returnung. Where is it getting the information?
     
  10. FreakinEurekan macrumors 68040

    FreakinEurekan

    Joined:
    Sep 8, 2011
    Location:
    Eureka Springs, Arkansas
    #10
    Keychain
     
  11. macmacmacr, Mar 28, 2017
    Last edited: Mar 28, 2017

    macmacmacr thread starter macrumors member

    Joined:
    Dec 23, 2014
    #11
    The keychain is where the Mac OS keeps all of its internal passwords like the SSID for WIFI is kept there on Yosemite. When I removed the key for the SSID in the keychain I am trying to delete, it still remains in the network preferences.
     

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