EtreCheck detected an Adware, which I have succesfully deleted, so maybe this was actually a problem. This is an output that I got the second time I ran the app right after the adware had been deleted and Flash Player updated.
EtreCheck version: 3.0.3 (307)
Report generated 2016-09-14 09:16:42
Download EtreCheck from https://etrecheck.com
Runtime 1:25
Performance: Excellent
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Problem: No problem - just checking
Hardware Information:ⓘ
MacBook Pro (Retina, 13-inch, Early 2015)
[Technical Specifications] - [User Guide] - [Warranty & Service]
MacBook Pro - model: MacBookPro12,1
1 2,9 GHz Intel Core i5 CPU: 2-core
8 GB RAM Not upgradeable
BANK 0/DIMM0
4 GB DDR3 1867 MHz ok
BANK 1/DIMM0
4 GB DDR3 1867 MHz ok
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en0: 802.11 a/b/g/n/ac
Battery: Health = Normal - Cycle count = 304
Video Information:ⓘ
Intel Iris Graphics 6100
Color LCD 2880 x 1800
System Software:ⓘ
OS X El Capitan 10.11.6 (15G1004) - Time since boot: about 8 hours
Disk Information:ⓘ
APPLE SSD SM0512G disk0 : (500,28 GB) (Solid State - TRIM: Yes)
EFI (disk0s1) <not mounted> : 210 MB
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
OSXRESERVED (disk0s4) /Volumes/OSXRESERVED : 8.00 GB (793 MB free)
BOOTCAMP (disk0s5) /Volumes/BOOTCAMP : 240.58 GB (167.54 GB free)
disk0s6 (disk0s6) <not mounted> : 472 MB
Macintosh HD (disk1) / : 250.00 GB (91.48 GB free)
Encrypted AES-XTS Unlocked
Core Storage: disk0s2 250.36 GB Online
USB Information:ⓘ
Western Digital My Passport 0743 1 TB
EFI (disk2s1) <not mounted> : 210 MB
My Passport (disk2s2) /Volumes/My Passport : 999.86 GB (62.39 GB free)
Broadcom Corp. Bluetooth USB Host Controller
Thunderbolt Information:ⓘ
Apple Inc. thunderbolt_bus
Configuration files:ⓘ
System Integrity Protection status: disabled
Gatekeeper:ⓘ
Mac App Store and identified developers
Unknown Files:ⓘ
~/Library/LaunchAgents/com.appart.AppArt.plist
~/Library/Application Support/AppPolicy/AppArt -i -c 808263 -isn 15C08196-CB19-4234-86A2-0824D17C5914
One unknown file found. [Check files]
Kernel Extensions:ⓘ
/System/Library/Extensions
[not loaded] com.razer.starcraft.driver (1.04 - 2016-09-13) [Support]
/System/Library/Extensions/RazerStarCraft.kext/Contents/PlugIns
[not loaded] com.razer.starcraft.driver.hid (1.04 - 2011-04-05) [Support]
System Launch Agents:ⓘ
[running] net.culater.SIMBL.Agent.plist (2015-11-12) [Support]
[not loaded] 7 Apple tasks
[loaded] 150 Apple tasks
[running] 81 Apple tasks
System Launch Daemons:ⓘ
[not loaded] 46 Apple tasks
[loaded] 155 Apple tasks
[running] 89 Apple tasks
Launch Agents:ⓘ
[loaded] com.oracle.java.Java-Updater.plist (2015-09-12) [Support]
[loaded] org.macosforge.xquartz.startx.plist (2015-10-16) [Support]
Launch Daemons:ⓘ
[loaded] com.adobe.fpsaud.plist (2016-08-30) [Support]
[loaded] com.oracle.java.Helper-Tool.plist (2015-09-12) [Support]
[loaded] org.macosforge.xquartz.privileged_startx.plist (2015-10-16) [Support]
User Launch Agents:ⓘ
[running] com.appart.AppArt.plist (2016-09-10) [Support]
[loaded] com.bittorrent.BitTorrent.plist (2015-08-08)
[loaded] com.google.keystone.agent.plist (2016-07-13) [Support]
[loaded] com.macpaw.CleanMyMac3.Scheduler.plist (2016-09-12)
[loaded] com.valvesoftware.steamclean.plist (2016-09-12) [Support]
[running] homebrew.mxcl.mongodb.plist (2016-04-03) [Support]
User Login Items:ⓘ
iTunesHelper Программа (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Google Диск Программа (/Applications/Google Drive.app)
Shazam Программа (/Applications/Shazam.app)
Dropbox Программа (/Applications/Dropbox.app)
Apptivate Программа Hidden (/Applications/Apptivate.app)
Google Photos Backup Программа (/Applications/Google Photos Backup.app)
cDockHelper Программа (/Applications/cDock.app/Contents/Resources/cDockHelper.app)
Помощник управления контентом Программа (/Applications/CMA.app)
Internet Plug-ins:ⓘ
FlashPlayer-10.6: 23.0.0.162 - SDK 10.9 (2016-09-14) [Support]
QuickTime Plugin: 7.7.3 (2016-07-20)
Flash Player: 23.0.0.162 - SDK 10.9 (2016-09-14) [Support]
JavaAppletPlugin: Java 8 Update 73 build 02 (2016-02-27) Check version
Default Browser: 601 - SDK 10.11 (2016-07-20)
Safari Extensions:ⓘ
SaveFrom.net helper - SaveFrom.net - http://savefrom.net (2016-07-19)
3rd Party Preference Panes:ⓘ
Flash Player (2016-08-30) [Support]
Java (2016-02-27) [Support]
Razer StarCraft II (2015-08-31) [Support]
Time Machine:ⓘ
Mobile backups: OFF
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 250.00 GB Disk used: 158.52 GB
Destinations:
My Passport [Local]
Total size: 999.86 GB
Total number of backups: 25
Oldest backup: 17.08.15, 22:14
Last backup: 08.07.16, 1:32
Size of backup disk: Excellent
Backup size 999.86 GB > (Disk size 250.00 GB X 3)
Top Processes by CPU:ⓘ
46% backupd
35% kernel_task
4% WindowServer
4% coreaudiod
2% fontd
Top Processes by Memory:ⓘ
925 MB kernel_task
319 MB com.apple.WebKit.WebContent(5)
238 MB mdworker(13)
123 MB Mail
106 MB Safari
Virtual Memory Information:ⓘ
2.82 GB Free RAM
5.18 GB Used RAM (3.91 GB Cached)
26 MB Swap Used
Diagnostics Information:ⓘ
Sep 14, 2016, 12:53:32 AM Self test - passed
Sep 13, 2016, 11:47:15 AM ~/Library/Logs/DiagnosticReports/Finder_2016-09-13-114715_[redacted].crash
com.apple.finder - /System/Library/CoreServices/Finder.app/Contents/MacOS/Finder
Sep 12, 2016, 05:14:33 AM ~/Library/Logs/DiagnosticReports/Google Chrome_2016-09-12-051433_[redacted].crash
com.google.Chrome - /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
Files deleted by EtreCheck:ⓘ
Sep 14, 2016, 09:08:33 AM - ~/Library/LaunchAgents/com.applicationstats.AppStats.plist