Probably not. There could be a variety of reasons for the sluggishness.
Download and run the free Etrecheck:
https://etrecheck.com/#download Post the Etrecheck report back here.
Also, open Disk Utility, click on MacIntosh HD in the top left window, then on either Repair Disk or First Aid (depending on the version of your system software. Let us know if it reports any errors.
EtreCheck version: 3.0.3 (307)
Report generated 2016-09-14 10:57:51
Download EtreCheck from
https://etrecheck.com
Runtime 2:29
Performance: Excellent
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Problem: Computer is too slow
Hardware Information: ⓘ
MacBook Pro (13-inch, Late 2011)
[Technical Specifications] - [User Guide] - [Warranty & Service]
MacBook Pro - model: MacBookPro8,1
1 2.4 GHz Intel Core i5 CPU: 2-core
4 GB RAM
BANK 0/DIMM0
2 GB DDR3 1333 MHz ok
BANK 1/DIMM0
2 GB DDR3 1333 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Battery: Health = Normal - Cycle count = 963
Video Information: ⓘ
Intel HD Graphics 3000 - VRAM: 384 MB
Color LCD 1280 x 800
System Software: ⓘ
OS X Mountain Lion 10.8.5 (12F2560) - Time since boot: about one day
Disk Information: ⓘ
WDC WD5000LPVX-00V0TT0 disk0 : (500.11 GB) (Rotational)
disk0s1 (disk0s1) <not mounted> : 210 MB
Untitled (disk0s2) / : 499.25 GB (245.68 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
MATSHITADVD-R UJ-8A8 ()
USB Information: ⓘ
Apple Inc. FaceTime HD Camera (Built-in)
Logitech USB Receiver
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Inc. BRCM2070 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Computer, Inc. IR Receiver
Thunderbolt Information: ⓘ
Apple Inc. thunderbolt_bus
Gatekeeper: ⓘ
Mac App Store and identified developers
Unknown Files: ⓘ
~/Library/LaunchAgents/amUpdater.plist
/Applications/Archive Manager.app/Contents/Resources/appUpdater am 1000
~/Library/LaunchAgents/mg.update.plist
~/Library/Application Support/mg/MG.app/Contents/MacOS/MG
2 unknown files found. [Check files]
System Launch Agents: ⓘ
[failed] com.apple.AirPlayUIAgent.plist (2013-01-06)
[failed] com.apple.coreservices.appleid.authentication.plist (2016-01-24)
[failed] com.apple.pbs.plist (2016-01-24)
[failed] com.apple.printtool.agent.plist (2016-01-24)
[not loaded] 4 Apple tasks
[loaded] 119 Apple tasks
[running] 17 Apple tasks
System Launch Daemons: ⓘ
[failed] com.apple.coresymbolicationd.plist (2016-01-24)
[not loaded] 57 Apple tasks
[loaded] 134 Apple tasks
[running] 43 Apple tasks
Launch Agents: ⓘ
[loaded] com.google.keystone.agent.plist (2016-07-11) [Support]
Launch Daemons: ⓘ
[loaded] com.adobe.fpsaud.plist (2016-08-29) [Support]
[loaded] com.google.keystone.daemon.plist (2016-09-01) [Support]
[loaded] com.malwarebytes.HelperTool.plist (2016-08-13) [Support]
[loaded] com.microsoft.office.licensing.helper.plist (2015-11-19) [Support]
[running] com.sec.faxdb.plist (2016-01-24) [Support]
User Launch Agents: ⓘ
[failed] amUpdater.plist (2016-07-20) [Support]
[loaded] com.adobe.ARM.[...].plist (2016-01-26) [Support]
[loaded] mg.update.plist (2016-07-25) [Support]
User Login Items: ⓘ
iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
AdobeResourceSynchronizer Application Hidden (/Applications/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app)
HP Device Monitor SMLoginItem (/Library/Printers/hp/Utilities/HP Utility.app/Contents/Library/LoginItems/HP Device Monitor.app)
HP Device Monitor SMLoginItem (/Library/Printers/hp/Utilities/HP Utility.app/Contents/Library/LoginItems/HP Device Monitor.app/Contents/Library/LoginItems/HP Device Monitor.app)
Internet Plug-ins: ⓘ
FlashPlayer-10.6: 23.0.0.162 - SDK 10.9 (2016-09-13) [Support]
npDDRia: 0.0.14.2 - SDK 10.9 (2014-03-15) [Support]
AdobePDFViewerNPAPI: 11.0.13 - SDK 10.6 (2016-02-02) [Support]
Flash Player: 23.0.0.162 - SDK 10.9 (2016-09-13) [Support]
AdobePDFViewer: 11.0.13 - SDK 10.6 (2016-02-02) [Support]
QuickTime Plugin: 7.7.1 (2016-01-26)
SharePointBrowserPlugin: 14.5.9 - SDK 10.6 (2016-01-24) [Support]
Google Earth Web Plug-in: 7.1 (2016-05-20) [Support]
JavaAppletPlugin: 14.6.0 - SDK 10.8 (2016-01-24) Check version
User internet Plug-ins: ⓘ
CitrixOnlineWebDeploymentPlugin: 1.0.105 (2013-04-25) [Support]
Safari Extensions: ⓘ
Dragon Dictate - Nuance Communications, Inc -
http://www.nuance.com (2016-03-18)
3rd Party Preference Panes: ⓘ
Flash Player (2016-08-29) [Support]
Time Machine: ⓘ
Mobile backups: OFF
Auto backup: NO - Auto backup turned off
Destinations:
Seagate Backup Plus Drive [Local]
Total size: 0 B
Total number of backups: 0
Oldest backup: -
Last backup: -
Size of backup disk: Excellent
Backup size 0 B > (Disk size 0 B X 3)
Top Processes by CPU: ⓘ
4% WindowServer
4% firefox
2% AdobeReader
1% plugin-container
0% fontd
Top Processes by Memory: ⓘ
1.22 GB firefox
102 MB Microsoft Word
78 MB WindowServer
70 MB Finder
70 MB mds
Virtual Memory Information: ⓘ
33 MB Free RAM
3.97 GB Used RAM
2.98 GB Swap Used
Diagnostics Information: ⓘ
Sep 13, 2016, 10:58:06 PM ~/Library/Logs/DiagnosticReports/ksfetch_2016-09-13-225806_[redacted].crash
/Library/Google/*/GoogleSoftwareUpdate.bundle/Contents/MacOS/ksfetch
Sep 13, 2016, 10:58:02 PM /Library/Logs/DiagnosticReports/ksfetch_2016-09-13-225802_[redacted].crash
Sep 13, 2016, 10:58:01 PM /Library/Logs/DiagnosticReports/ksfetch_2016-09-13-225801_[redacted].crash
Sep 13, 2016, 04:25:47 PM ~/Library/Logs/DiagnosticReports/appUpdater_2016-09-13-162547_[redacted].crash
/Applications/Archive Manager.app/Contents/Resources/appUpdater
Sep 12, 2016, 06:52:29 PM ~/Library/Logs/DiagnosticReports/appUpdater_2016-09-12-185229_[redacted].crash
Sep 12, 2016, 06:49:09 PM Self test - passed
Sep 12, 2016, 03:52:09 PM ~/Library/Logs/DiagnosticReports/appUpdater_2016-09-12-155209_[redacted].crash
Sep 12, 2016, 07:54:37 AM ~/Library/Logs/DiagnosticReports/appUpdater_2016-09-12-075437_[redacted].crash
Sep 12, 2016, 12:15:09 AM ~/Library/Logs/DiagnosticReports/appUpdater_2016-09-12-001509_[redacted].crash
Sep 11, 2016, 03:56:42 PM ~/Library/Logs/DiagnosticReports/appUpdater_2016-09-11-155642_[redacted].crash
Sep 11, 2016, 03:22:10 PM ~/Library/Logs/DiagnosticReports/ksfetch_2016-09-11-152210_[redacted].crash
Sep 11, 2016, 03:22:00 PM /Library/Logs/DiagnosticReports/ksfetch_2016-09-11-152200_[redacted].crash
Sep 11, 2016, 03:21:59 PM /Library/Logs/DiagnosticReports/ksfetch_2016-09-11-152159_[redacted].crash
[doublepost=1473876258][/doublepost]
Probably not. There could be a variety of reasons for the sluggishness.
Download and run the free Etrecheck:
https://etrecheck.com/#download Post the Etrecheck report back here.
Also, open Disk Utility, click on MacIntosh HD in the top left window, then on either Repair Disk or First Aid (depending on the version of your system software. Let us know if it reports any errors.