Q: Mac keeps randomly freezing

EtreCheck version: 2.9.12 (265)

Report generated 2016-05-27 17:25:02

Download EtreCheck from https://etrecheck.com

Runtime 4:57

Performance: Good

Click the [Support] links for help with non-Apple products.

Click the [Details] links for more information about that line.

Problem: Other problem

Description:

Freezes RANDOMLY

Hardware Information: ⓘ

    MacBook Pro (13-inch, Mid 2012)

    [Technical Specifications] - [User Guide] - [Warranty & Service]

    MacBook Pro - model: MacBookPro9,2

    1 2,5 GHz Intel Core i5 CPU: 2-core

    4 GB RAM Upgradeable - [Instructions]

        BANK 0/DIMM0

            2 GB DDR3 1600 MHz ok

        BANK 1/DIMM0

            2 GB DDR3 1600 MHz ok

    Bluetooth: Good - Handoff/Airdrop2 supported

    Wireless:  en1: 802.11 a/b/g/n

    Battery: Health = Normal - Cycle count = 736

Video Information: ⓘ

    Intel HD Graphics 4000

        Color LCD 1280 x 800

System Software: ⓘ

    OS X El Capitan 10.11.5 (15F34) - Time since boot: less than an hour

Disk Information: ⓘ

    APPLE HDD HTS545050A7E362 disk0 : (500,11 GB) (Rotational)

        EFI (disk0s1) <not mounted> : 210 MB

        Recovery HD (disk0s3) <not mounted>  [Recovery]: 650 MB

        Macintosh HD (disk1) / : 498.88 GB (456.05 GB free)

            Encrypted AES-XTS Unlocked Failed

            Core Storage: disk0s2 499.25 GB Online

    HL-DT-ST DVDRW  GS41N   ()

USB Information: ⓘ

    Apple Inc. FaceTime HD Camera (Built-in)

    Apple Inc. Apple Internal Keyboard / Trackpad

    Apple Computer, Inc. IR Receiver

    Apple Inc. BRCM20702 Hub

        Apple Inc. Bluetooth USB Host Controller

Thunderbolt Information: ⓘ

    Apple Inc. thunderbolt_bus

Gatekeeper: ⓘ

    Mac App Store and identified developers

Startup Items: ⓘ

    HWNetMgr: Path: /Library/StartupItems/HWNetMgr

    HWPortDetect: Path: /Library/StartupItems/HWPortDetect

    StartOuc: Path: /Library/StartupItems/StartOuc

    Startup items are obsolete in OS X Yosemite

System Launch Agents: ⓘ

    [not loaded]    7 Apple tasks

    [loaded]    162 Apple tasks

    [running]    69 Apple tasks

System Launch Daemons: ⓘ

    [not loaded]    48 Apple tasks

    [loaded]    159 Apple tasks

    [running]    83 Apple tasks

Launch Daemons: ⓘ

    [loaded]    com.microsoft.office.licensing.helper.plist (2010-08-25) [Support]

User Login Items: ⓘ

    iTunesHelper    Application  (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

Other Apps: ⓘ

    [loaded]    396 Apple tasks

    [running]    175 Apple tasks

Internet Plug-ins: ⓘ

    Default Browser: 601 - SDK 10.11 (2016-05-23)

    QuickTime Plugin: 7.7.3 (2016-05-23)

    SharePointBrowserPlugin: 14.0.0 (2010-08-25) [Support]

Safari Extensions: ⓘ

    SaveFrom.net helper - SaveFrom.net - http://savefrom.net (2016-05-23)

3rd Party Preference Panes: ⓘ

    None

Time Machine: ⓘ

    Time Machine not configured!

Top Processes by CPU: ⓘ

        25%    SystemUIServer

        24%    Safari

        15%    corestoraged

        11%    kernel_task

         7%    WindowServer

Top Processes by Memory: ⓘ

    569 MB    kernel_task

    463 MB    com.apple.WebKit.WebContent(3)

    197 MB    iTunes

    168 MB    mdworker(10)

    82 MB    WindowServer

Virtual Memory Information: ⓘ

    511 MB    Free RAM

    3.50 GB    Used RAM (1.22 GB Cached)

    0 B    Swap Used

Diagnostics Information: ⓘ

    May 27, 2016, 04:52:28 PM    Self test - passed

    May 25, 2016, 07:00:07 PM    /Library/Logs/DiagnosticReports/iTunes_2016-05-25-190007_[redacted].hang

        /Applications/iTunes.app/Contents/MacOS/iTunes

  Macintosh HD (disk1) / : 498.88 GB (456.05 GB free)

            Encrypted AES-XTS Unlocked Failed

            Core Storage: disk0s2 499.25 GB Online

I recently took it to iStore cause someone formatted the drive and deleted the OS, then it was fixed and the freezes/lagging started after I did an upgrade.

If you have already done that re-writing once, it is time for a new drive.