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  1. #1
    What the heck could be this issue?
    I am working with a 2011 Macbook Pro 17"

    All of a sudden both WIFI & Ethernet goes out and don't see services in network prefs. Only way to connect to internet on computer is by tethering my iPhone.

    Opened up and made sure connections were tight and everything looked okay. Reinstalled High Sierra still the same. Reformatted HD and fresh installed Sierra same - Did it again and installed El Capiton Still the same.

    It was at this point I was thinking I needed to replace hardware when........

    Took out a USB Drive with a old Backup I took with Carbon Copy Cloner that has Sierra as the OS and booted from the external drive. Everything came up and works perfectly.

    Can't be hardware but why will it not work when I fresh install any of the versions of OS X?

    Anyone?

  2. #2
    What the heck could be this issue?
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    40,875
    Your Mac's Specs
    2011 17" MBP 2.2ghz, 16gig ram, OS 10.11.6
    Quote Originally Posted by azcolor View Post

    Took out a USB Drive with a old Backup I took with Carbon Copy Cloner that has Sierra as the OS and booted from the external drive. Everything came up and works perfectly.

    Can't be hardware but why will it not work when I fresh install any of the versions of OS X?

    Anyone?
    Depends on how much difference (and time) there has been since that old backup & the current setup. With the current setup could be file corruption...3rd party app conflicts...important OS files moved or deleted accidentially...or combinations of things.

    What I would do with the current setup is run the free maintenance app called "Onyx"...and see if that helps. Could also try a PRAM Reset.

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

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