My iMac became slower. It also needs much more time to start up. How can I solve this?

Question

Problem description:My i Mac became slowerEtreCheck version: 2.2 (132)Report generated 5/6/15, 1:55 PMDownload EtreCheck from http://etresoft.com/etrecheckClick 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    iMac (21.5-inch, Late 2012) (Technical Specifications)    iMac - model: iMac13,1    1 2.7 GHz Intel Core i5 CPU: 4-core    8 GB RAM Upgradeable        BANK 0/DIMM0            4 GB DDR3 1600 MHz ok        BANK 1/DIMM0            4 GB DDR3 1600 MHz ok    Bluetooth: Good - Handoff/Airdrop2 supported    Wireless:  en1: 802.11 a/b/g/nVideo Information: ℹ️    NVIDIA GeForce GT 640M - VRAM: 512 MB        iMac 1920 x 1080System Software: ℹ️    OS X 10.10.3 (14D136) - Time since boot: 4:11:30Disk Information: ℹ️    APPLE HDD ST1000LM024 disk0 : (1 TB)        EFI (disk0s1) &lt;not mounted&gt; : 210 MB         Macintosh HD (disk0s2) / : 999.35 GB (84.92 GB free)        Recovery HD (disk0s3) &lt;not mounted&gt;  [Recovery]: 650 MB USB Information: ℹ️    Apple Inc. FaceTime HD Camera (Built-in)     Apple Inc. BRCM20702 Hub         Apple Inc. Bluetooth USB Host Controller Thunderbolt Information: ℹ️    Apple Inc. thunderbolt_busGatekeeper: ℹ️    Mac App Store and identified developersProblem System Launch Agents: ℹ️    [killed]    com.apple.CallHistoryPluginHelper.plist    [killed]    com.apple.CallHistorySyncHelper.plist    [killed]    com.apple.EscrowSecurityAlert.plist    [killed]    com.apple.icloud.fmfd.plist    [killed]    com.apple.Maps.pushdaemon.plist    [killed]    com.apple.telephonyutilities.callservicesd.plist    [killed]    com.apple.xpc.loginitemregisterd.plist    7 processes killed due to memory pressureProblem System Launch Daemons: ℹ️    [killed]    com.apple.awdd.plist    [killed]    com.apple.ctkd.plist    [killed]    com.apple.icloud.findmydeviced.plist    [killed]    com.apple.ifdreader.plist    [killed]    com.apple.nehelper.plist    [killed]    com.apple.nsurlsessiond.plist    [killed]    com.apple.softwareupdate_download_service.plist    [killed]    com.apple.tccd.system.plist    [killed]    com.apple.wdhelper.plist    [killed]    com.apple.xpc.smd.plist    10 processes killed due to memory pressureLaunch Agents: ℹ️    [loaded]    com.oracle.java.Java-Updater.plist [Click for support]Launch Daemons: ℹ️    [loaded]    com.adobe.fpsaud.plist [Click for support]    [loaded]    com.oracle.java.Helper-Tool.plist [Click for support]User Launch Agents: ℹ️    [loaded]    com.google.keystone.agent.plist [Click for support]User Login Items: ℹ️    iTunesHelper    Εφαρμογή  (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)    ToneSync    Εφαρμογή  (/Applications/ToneSync.app)    Wondershare Helper Compact    Εφαρμογή  (/Users/[redacted]/Library/Application Support/Helper/Wondershare Helper Compact.app)Internet Plug-ins: ℹ️    Flip4Mac WMV Plugin: Version: 3.2.0.16   - SDK 10.8 [Click for support]    FlashPlayer-10.6: Version: 17.0.0.169 - SDK 10.6 [Click for support]    QuickTime Plugin: Version: 7.7.3    Flash Player: Version: 17.0.0.169 - SDK 10.6 [Click for support]    Default Browser: Version: 600 - SDK 10.10    AnyMeeting_v3.0.1: Version: AnyMeeting_v3.0.1 3.0.1 - SDK 10.9 [Click for support]    SiteAdvisor: Version: 2.0 - SDK 10.1 [Click for support]    JavaAppletPlugin: Version: Java 8 Update 45 Check versionSafari Extensions: ℹ️    SiteAdvisor3rd Party Preference Panes: ℹ️    Flash Player  [Click for support]    Flip4Mac WMV  [Click for support]    Java  [Click for support]Time Machine: ℹ️    Time Machine not configured!Top Processes by CPU: ℹ️         2%    com.apple.WebKit.WebContent(4)         2%    WindowServer         2%    fontd         1%    App Store         1%    storeaccountdTop Processes by Memory: ℹ️    700 MB    kernel_task    246 MB    com.apple.WebKit.WebContent(4)    131 MB    mdworker(8)    115 MB    Mail    98 MB    mds_storesVirtual Memory Information: ℹ️    4.51 GB    Free RAM     3.48 GB    Used RAM     172 MB    Swap Used Diagnostics Information: ℹ️    May 6, 2015, 09:41:43 AM    Self test - passed    May 6, 2015, 12:11:44 AM    /Library/Logs/DiagnosticReports/com.apple.AmbientDisplayAgent_2015-05-06-001144 _[redacted].crash    May 5, 2015, 04:06:36 PM    /Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_2015-05-05-160636_[ redacted].cpu_resource.diag [Click for details]    Apr 24, 2015, 03:22:39 PM    /Library/Logs/DiagnosticReports/Kernel_2015-04-24-152239_[redacted].panic [Click for details]

BobHarris · Answer

There is not much in the EtreCheck output to indicate what is happening.While you have 8GB of RAM (which is a good amount), you were either running something that demanded a huge amount of RAM that caused Mac OS X to kill off some of its own daemons to free up space, or it is still running and EtreCheck has not identified it.If you know of a memory hungry app you were just running, that might be the problem.  If not, then...Then you might try booting into Safe Mode to see if the problem continues&lt;http://support.apple.com/kb/ht1564&gt; But based on your EtreCheck output you are not starting very many 3rd party additions, so Safe Mode may not change anything.You might try running Applications -&gt; Utilities -&gt; Activity Monitor -&gt; Memory and see if you can identify what is consuming all your RAM forcing your Memory Pressure to go into the Red.  Green is memory doing just fine.  Yellow is Mac OS X starting to compress idle RAM to avoid paging to disk.   Red is Mac OS X is forced to start killing daemons and paging to disk to get more memory for other tasks.  The fact that you have killed Apple daemons indicates you were running with Red memory pressure.

Linc Davis · Answer

When you see a beachball cursor or the slowness is especially bad, note the exact time: hour, minute, second.   These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.Launch the Console application in any of the following ways:☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.☞ Open LaunchPad and start typing the name.The title of the Console window should be All Messages. If it isn&#x27;t, select          SYSTEM LOG QUERIES ▹ All Messagesfrom the log list on the left. If you don&#x27;t see that list, select          View ▹ Show Log Listfrom the menu bar at the top of the screen.Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above.Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.Please don&#x27;t indiscriminately dump thousands of lines from the log into this discussion.Please don&#x27;t post screenshots of log messages—post the text.Some private information, such as your name, may appear in the log. Anonymize before posting.When you post the log extract, you might see an error message on the web page: "You have included content in your post that is not permitted," or "The message contains invalid characters." That&#x27;s a bug in the forum software. Please post the text on Pastebin, then post a link here to the page you created.