Q: my safari wont open, it says its not compatible with mac os sierra

i installed it right from the app store (but i got there from the popup notification that told me there was a new update). and no i haven't moved anything in my applications except look at safari's info

EtreCheck version: 3.0.6 (315)

Report generated 2016-10-22 23:16:20

Download EtreCheck from https://etrecheck.com

Runtime 1:44

Performance: Excellent

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

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

Problem: Other problem

Description:

safari isn’t opening because it isn’t compatible with macOS Sierra

Hardware Information: ⓘ

    MacBook Pro (Retina, 13-inch, Late 2013)

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

    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 = 605

Video Information: ⓘ

    Intel Iris

        Color LCD 2560 x 1600

System Software: ⓘ

    macOS Sierra  10.12 (16A323) - Time since boot: less than an hour

Disk Information: ⓘ

    APPLE SSD SD0128F disk0 : (121.33 GB) (Solid State - TRIM: Yes)

        EFI (disk0s1) <not mounted> : 210 MB

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

        Macintosh HD (disk1) /  [Startup]: 120.12 GB (29.14 GB free)

            Core Storage: disk0s2 120.47 GB Online

USB Information: ⓘ

    Apple Inc. Apple Internal Keyboard / Trackpad

    Apple Inc. BRCM20702 Hub

        Apple Inc. Bluetooth USB Host Controller

Thunderbolt Information: ⓘ

    Apple Inc. thunderbolt_bus

Gatekeeper: ⓘ

    Mac App Store and identified developers

System Launch Agents: ⓘ

    [not loaded]    6 Apple tasks

    [loaded]    168 Apple tasks

    [running]    97 Apple tasks

System Launch Daemons: ⓘ

    [not loaded]    43 Apple tasks

    [loaded]    159 Apple tasks

    [running]    100 Apple tasks

Launch Agents: ⓘ

    [running]    com.adobe.AdobeCreativeCloud.plist (2016-05-04) [Support]

Launch Daemons: ⓘ

    [running]    com.adobe.adobeupdatedaemon.plist (2016-06-21) [Support]

    [running]    com.adobe.agsservice.plist (2016-10-09) [Support]

    [loaded]    com.apple.installer.osmessagetracing.plist (2016-09-13)

User Launch Agents: ⓘ

    [loaded]    com.google.keystone.agent.plist (2016-07-11) [Support]

    [running]    com.spotify.webhelper.plist (2016-10-22) [Support]

User Login Items: ⓘ

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

    Spotify    Application Hidden (/Applications/Spotify.app)

Internet Plug-ins: ⓘ

    Silverlight: 5.1.30514.0 - SDK 10.6 (2014-07-29) [Support]

    AdobeAAMDetect: 3.0.0.0 - SDK 10.9 (2016-06-21) [Support]

    QuickTime Plugin: 7.7.3 (2016-09-13)

Safari Extensions: ⓘ

    AdBlock - BetaFish, Inc. - https://getadblock.com (2016-10-05)

3rd Party Preference Panes: ⓘ

    None

Time Machine: ⓘ

    Time Machine not configured!

Top Processes by CPU: ⓘ

       131%    photoanalysisd

         6%    WindowServer

         2%    fontd

         2%    kernel_task

         1%    com.apple.AmbientDisplayAgent

Top Processes by Memory: ⓘ

    725 MB    Google Chrome Helper(7)

    544 MB    kernel_task

    307 MB    mdworker(17)

    135 MB    Google Chrome

    131 MB    photoanalysisd

Virtual Memory Information: ⓘ

    43 MB    Free RAM

    3.95 GB    Used RAM (814 MB Cached)

    456 MB    Swap Used

Diagnostics Information: ⓘ

    Oct 22, 2016, 10:15:39 PM    Self test - passed