Why is my Mac running so slow?

Ever since I upgraded to Yosemite, my mac has been performing more poorly. It's slow on the internet and when I use Logic Pro X I get more frequent prompts such as "System running slow or CPU overload" I don't have much stored on my mac in the way of photos or videos. So it shouldn't be a memory issue.

I'm trying to learn how to keep my mac happier, and the ins and outs of computers in general. Any advice that anyone can offer on how I can augment my mac's performance on my own would be greatly appreciated! Thanks, Joseph

I ran the EtreCheck. Here's the diagnosis.

Problem description:

Ever since the yosemite upgrade my mac has been running very slowly. It’s slow on the internet and when I’m running logic pro X especially. “System running slow or CPU overload” prompt always comes up.

EtreCheck version: 2.2 (132)

Report generated 6/29/15, 11:28 PM

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

Click the [Click to remove] links for help removing adware.

Hardware Information: ℹ️

MacBook Pro (13-inch, Mid 2012) (Technical Specifications)

MacBook Pro - model: MacBookPro9,2

1 2.5 GHz Intel Core i5 CPU: 2-core

4 GB RAM 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: en1: 802.11 a/b/g/n

Battery: Health = Normal - Cycle count = 180 - SN = W042805U2D3LC

Video Information: ℹ️

Intel HD Graphics 4000

Color LCD 1280 x 800

System Software: ℹ️

OS X 10.10.1 (14B25) - Time since boot: 8:22:47

Disk Information: ℹ️

APPLE HDD HTS545050A7E362 disk0 : (500.11 GB)

EFI (disk0s1) <not mounted> : 210 MB

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

Macintosh HD (disk1) / : 498.88 GB (48.22 GB free)

Encrypted AES-XTS Unlocked

Core Storage: disk0s2 499.25 GB Online

HL-DT-ST DVDRW GS41N

USB Information: ℹ️

Apple Inc. FaceTime HD Camera (Built-in)

Apple Inc. Apple Internal Keyboard / Trackpad

Apple Inc. BRCM20702 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Computer, Inc. IR Receiver

Thunderbolt Information: ℹ️

Apple Inc. thunderbolt_bus

Gatekeeper: ℹ️

Mac App Store and identified developers

Adware: ℹ️

Downlite, VSearch, Conduit, Trovi, MyBrand, Search ProtectAdware! [Click to remove]

Kernel Extensions: ℹ️

/Library/Extensions

[loaded] com.sophos.kext.sav (9.2.50 - SDK 10.8) [Click for support]

[loaded] com.sophos.nke.swi (9.2.50 - SDK 10.8) [Click for support]

Startup Items: ℹ️

KeyAccess: Path: /Library/StartupItems/KeyAccess

Startup items are obsolete in OS X Yosemite

Launch Agents: ℹ️

[not loaded] com.adobe.AAM.Updater-1.0.plist [Click for support]

[running] com.adobe.AdobeCreativeCloud.plist [Click for support]

[running] com.jamfsoftware.jamf.agent.plist [Click for support]

[running] com.pharos.notify.plist [Click for support]

[running] com.pharos.popup.plist [Click for support]

[running] com.sassafras.KeyAccess.plist [Click for support]

[running] com.sophos.uiserver.plist [Click for support]

Launch Daemons: ℹ️

[running] com.jamfsoftware.jamf.daemon.plist [Click for support]

[not loaded] com.jamfsoftware.startupItem.plist [Click for support]

[loaded] com.jamfsoftware.task.1.plist [Click for support]

[running] com.sassafras.KeyAccess.plist [Click for support]

[running] com.sophos.common.servicemanager.plist [Click for support]

User Launch Agents: ℹ️

[loaded] com.adobe.AAM.Updater-1.0.plist [Click for support]

[loaded] com.google.keystone.agent.plist [Click for support]

[running] com.spotify.webhelper.plist [Click for support]

User Login Items: ℹ️

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

uTorrent UNKNOWN (missing value)

Google Drive Application (/Users/[redacted]/.Trash/Google Drive.app)

Spotify Application Hidden (/Users/[redacted]/.Trash/Spotify.app)

Internet Plug-ins: ℹ️

Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]

net.juniper.DSSafariExtensions: Version: Unknown [Click for support]

QuickTime Plugin: Version: 7.7.3

AdobeAAMDetect: Version: AdobeAAMDetect 2.0.0.0 - SDK 10.7 [Click for support]

Default Browser: Version: 600 - SDK 10.10

3rd Party Preference Panes: ℹ️

KeyAccess [Click for support]

Time Machine: ℹ️

Time Machine not configured!

Top Processes by CPU: ℹ️

8% Spotify Helper(2)

2% WindowServer

1% fontd

0% Creative Cloud

0% Spotify

Top Processes by Memory: ℹ️

453 MB kernel_task

315 MB com.apple.WebKit.WebContent(3)

233 MB Spotify Helper(2)

180 MB SophosScanD

168 MB InterCheck

Virtual Memory Information: ℹ️

65 MB Free RAM

3.93 GB Used RAM

49 MB Swap Used

Diagnostics Information: ℹ️

Jun 29, 2015, 03:03:58 PM Self test - passed

Jun 28, 2015, 06:37:32 PM /Users/[redacted]/Library/Logs/DiagnosticReports/CalendarAgent_2015-06-28-18373 2_[redacted].crash