2011 MBA Locking Up

Discussion in 'MacBook Air' started by Mobster1983, Apr 22, 2012.

  1. Mobster1983 macrumors 6502

    Joined:
    Sep 8, 2011
    #1
    I am running a mid-2011 MBA with 1.8 Ghz Core i7, 4Gb RAM and a 256 Gb SSD. The lat couple weeks it's been locking up on a regular basis. I'm not doing a lot on it. Things that cause it to lock up include: downloading large files on iTunes, running a scan with Tech Tool 6, running Sophos virus scan, deleting large files from trash, deleting free space, and other tasks that would take several hours.

    The MBA seems to lock up if the screen saver activates. It runs fine when the screen saver is not running, but locks up and requires award restart wy too often.

    Any recommendations?

    I am running all up to date software.
     
  2. halledise macrumors 65816

    Joined:
    May 7, 2009
    Location:
    Hamilton Island, Whitsundays, QLD Australia
    #2
    try running these commands one at a time in Terminal

    then restart your machine

    sudo chown root:admin /

    sudo kextcache -system-prelinked-kernel

    sudo kextcache -system-caches
     
  3. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #3
    I recommend that you avoid using Sophos, as it could actually increase your Mac's vulnerability, as described here and here.

    Macs are not immune to malware, but no true viruses exist in the wild that can run on Mac OS X, and there never have been any since it was released over 10 years ago. The only malware in the wild that can affect Mac OS X is a handful of trojans, which can be easily avoided by practicing safe computing (see below). Also, Mac OS X Snow Leopard and Lion have anti-malware protection built in, further reducing the need for 3rd party antivirus apps.
    1. Make sure your built-in Mac firewall is enabled in System Preferences > Security > Firewall

    2. Uncheck "Open "safe" files after downloading" in Safari > Preferences > General

    3. Disable Java in your browser. (For Safari users, uncheck "Enable Java" in Safari > Preferences > Security.) This will protect you from malware that exploits Java in your browser, including the recent Flashback trojan. Leave this unchecked until you visit a trusted site that requires Java, then re-enable only for the duration of your visit to that site. (This is not to be confused with JavaScript, which you should leave enabled.)

    4. Change your DNS servers to OpenDNS servers by reading this.

    5. Be careful to only install software from trusted, reputable sites. Never install pirated software. If you're not sure about an app, ask in this forum before installing.

    6. Never let someone else have access to install anything on your Mac.

    7. Don't open files that you receive from unknown or untrusted sources.

    8. For added security, make sure all network, email, financial and other important passwords are long and complex, including upper and lower case letters, numbers and special characters.

    9. Always keep your Mac and application software updated. Use Software Update for your Mac software. For other software, it's safer to get updates from the developer's site or from the menu item "Check for updates", rather than installing from any notification window that pops up while you're surfing the web.
    That's all you need to do to keep your Mac completely free of any virus, trojan, spyware, keylogger, or other malware. You don't need any 3rd party software to keep your Mac secure.
     

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