blank popup appear when updating mac when i wanted to update the mac, this thing appear, so i can't.
maybe it's cuz of some apps that i've downloaded, but i couldn't know which one is! i need to update the mac.
i tried to search for solutions, but there's no such a problem.
please help :( i'm really suffering and bored cuz of this problem.
thanks. 

10.9.5 and the model is macbook pro

EtreCheck version: 2.2 (132)
Report generated 5/31/15, 1:34 AM
Download EtreCheck from http://etresoft.com/etrecheck

Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.

Hardware Information: ℹ️
    MacBook Pro (Retina, 13-inch, Late 2013) (Technical Specifications)
    MacBook Pro - model: MacBookPro11,1
    1 2.4 GHz Intel Core i5 CPU: 2-core
    4 GB RAM Not upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1600 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1600 MHz ok
    Bluetooth: Good - Handoff/Airdrop2 supported
    Wireless:  en0: 802.11 a/b/g/n/ac
    Battery: Health = Normal - Cycle count = 202 - SN = D864062T07FFT5YAZ

Video Information: ℹ️
    Intel Iris
        Color LCD 2560 x 1600

System Software: ℹ️
    OS X 10.9.5 (13F1077) - Time since boot: 0:19:46

Disk Information: ℹ️
    APPLE SSD SD0128F disk0 : (121.33 GB)
        EFI (disk0s1)  : 210 MB 
        Macintosh HD (disk0s2) /  [Startup]: 120.47 GB (14.70 GB free) (Low!)
        Recovery HD (disk0s3)   [Recovery]: 650 MB 

USB Information: ℹ️
    Apple Internal Memory Card Reader 
    Apple Inc. Apple Internal Keyboard / Trackpad 
    Apple Inc. BRCM20702 Hub 
        Apple Inc. Bluetooth USB Host Controller 

Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus

Gatekeeper: ℹ️
    Mac App Store and identified developers

User Launch Agents: ℹ️
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]

User Login Items: ℹ️
    iTunesHelper    Application  (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    uTorrent    Application  (/Applications/uTorrent.app)
    AdobeResourceSynchronizer    Application  (/Applications/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app)
    RealPlayer Downloader Agent    Application  (/Users/[redacted]/Library/Application Support/RealNetworks/RealPlayer Downloader Agent.app)

Internet Plug-ins: ℹ️
    AdobePDFViewerNPAPI: Version: 11.0.07 - SDK 10.6 [Click for support]
    AdobePDFViewer: Version: 11.0.07 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Check version
    Default Browser: Version: 537 - SDK 10.9

User internet Plug-ins: ℹ️
    _SpeedTaoPlugin: Version: Unknown - SDK 10.7 [Click for support]
    iGetter Plugin: Version: 2.9.2 [Click for support]
    iGetterScriptablePlugin: Version: 2.9.2 [Click for support]
    RealPlayer Plugin: Version: Unknown [Click for support]

Safari Extensions: ℹ️
    FastestTube

3rd Party Preference Panes: ℹ️
    None

Time Machine: ℹ️
    Time Machine not configured!

Top Processes by CPU: ℹ️
       100%    MPlayerX
         4%    fontd
         3%    WindowServer
         2%    Google Chrome Helper(7)
         0%    RealPlayer Downloader Agent

Top Processes by Memory: ℹ️
    991 MB    com.apple.WebKit.WebContent(11)
    381 MB    Google Chrome Helper(7)
    345 MB    kernel_task
    115 MB    Safari
    98 MB    Google Chrome

Virtual Memory Information: ℹ️
    92 MB    Free RAM 
    3.78 GB    Used RAM 
    0 B    Swap Used 

Diagnostics Information: ℹ️
    May 31, 2015, 01:14:50 AM    Self test - passed
    May 29, 2015, 01:18:14 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/VLC_2015-05-29-011814_[redacted].crash
    May 28, 2015, 04:33:09 AM    /Library/Logs/DiagnosticReports/mds_2015-05-28-043309_[redacted].crash
Thank you for the report

Please disable the all following (from auto starting when you log in)


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


uTorrent


  Application (/Applications/uTorrent.app) 


AdobeResourceSynchronizer


  Application (/Applications/Adobe
  Reader.app/Contents/Support/AdobeResourceSynchronizer.app) 


RealPlayer


  Downloader Agent Application (/Users/[redacted]/Library/Application
  Support/RealNetworks/RealPlayer Downloader Agent.app)


How to do that:

Go to system preferences- user&amp; groups- you will see your log in profile. Click on the Log in items and disable anything using the (-) sign to remove.

Restart your system. If the MPlayer is still running STOP it. To do that press 3 keys all together [alt (option)+ cmd +esc]. A new widow will show where you can select the MPlayer and force quit it.

Finally lets repair your User profile.

Hold cmd+r during restarting of the computer

You will boot into the Repair Utilities screen. 

On top, in the Menu Bar click the Utilities item then select Terminal.

New window - type resetpassword

You will not reset the password but:

Instead, click on the icon for your Mac’s hard drive at the top. From the drop-down below it, select the user account where you are having issues.

At the bottom of the window, you’ll see an area labeled ‘Reset Home Directory Permissions and ACLs’. Click the Reset button there.


The reset process takes a couple of minutes. When it’s done, quit the programs you’ve opened and restart your Mac. 

If none of the above worked I am afraid you will need to restore your Mavericks first before Installing Yosemite. To that use the cmd+r again and follow the instructions how to restore. Normally you data will not be touched during this process, but if you have back up it is better.