AVG has built up a great reputation over the years for its free antivirus software. And its tune-up package, AVG TuneUp, is just as great. It has one of the best interfaces on the list that makes it clear what areas can be optimized and improved upon on your PC.
- Clean your Mac in single click. Free up space on your hard drive. Speed up your Mac by removing junk files. Delete sensitive and confidential data securely. Optimize your hard drive and make your Mac more stable.
- AVG TuneUp speeds up your Mac by addressing one of the main causes of a slow computer: it’s simply too full. Hard disk drives and SSDs will both significantly slow down if they reach 100% storage capacity. AVG TuneUp clears out old, unused, and wasted data to ensure that you have plenty of room for the files you do want.
Welcome to my User Tip.
One of our regulars here created a nifty little program to give us more experienced users a insight into your Mac and what's going on with it.
What you do is run this little program and paste the results to a forum post and ask others to assist.
The program will strip out personal data, but look it over to make sure anyway.
10.8 users may have to head to System Preferences > Security > General and 'Allow Downloads from Anywhere' temporarily to accept software from the web or they can hold Control key or right clicking on the Etresoft software to run it.
It doens't need to be installed or uses the Admin password, so you can delete it afterwards if you wish by dragging it to the Trash can.
Here is a sample output
Hardware Information:
27' iMac (Mid 2010)
27' iMac with widescreen LED display, introduced mid 2010.
iMac - model: iMac11,3
1 2.8 GHz Intel Core i5 CPU: 4 cores
12 GB RAM
Mac Tune Up Software Free Trial
Video Information:
ATI Radeon HD 5750 - VRAM: 1024 MB
Startup Items:
HWNetMgr - Path: /Library/StartupItems/HWNetMgr
HWPortDetect - Path: /Library/StartupItems/HWPortDetect
StartOuc - Path: /Library/StartupItems/StartOuc
System Software:
OS X 10.8.3 (12D78) - Uptime: 5 days 13:51
Best Free Mac Tune Up Software
Disk Information:
WDC WD1001FALS-40Y6A0 disk0 : (1 TB)

disk0s1 (disk0s1) <not mounted>: 209.7 MB
Lakshmi (disk0s2) /: 999.35 GB (584.66 GB free)
Recovery HD (disk0s3) <not mounted>: 650 MB
OPTIARC DVD RW AD-5680H
USB Information:
Apple Inc. iPhone
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Internal Memory Card Reader
LaCie LaCie Hard Drive USB
Brother QL-570
Apple Inc. Built-in iSight
Apple Computer, Inc. IR Receiver
FireWire Information:
Thunderbolt Information:
Kernel Extensions:
Problem System Launch Daemons:
Problem System Launch Agents:
Launch Daemons:
[loaded] com.adobe.fpsaud.plist
[loaded] com.barebones.textwrangler.plist
[loaded] com.bombich.ccc.plist
[loaded] com.microsoft.office.licensing.helper.plist

Launch Agents:
User Launch Agents:
User Login Items:
iTunesHelper
3rd Party Preference Panes:
Flash Player
Flip4Mac WMV
Internet Plug-ins:
Flash Player.plugin
FlashPlayer-10.6.plugin
Flip4Mac WMV Plugin.plugin
GarminGpsControl.plugin
iPhotoPhotocast.plugin
JavaAppletPlugin.plugin
net.juniper.DSSafariExtensions.plugin
OfficeLiveBrowserPlugin.plugin
QuickTime Plugin.plugin
SharePointBrowserPlugin.plugin
Silverlight.plugin
User Internet Plug-ins:
Bad Fonts:
None
Top Processes by CPU:
11% screensharingd
6% mds
3% WindowServer
1% EtreCheck
0% warmd
0% ouc
0% SystemUIServer
0% mDNSResponder
0% imagent
Top Processes by Memory:
221 MB mds
197 MB Safari
147 MB coreservicesd
140 MB Finder

123 MB WindowServer
74 MB CVMCompiler
74 MB Dock
61 MB screensharingd
61 MB Dropbox
49 MB CalendarAgent
Virtual Memory Statistics
Free: 8.07 GB
Active: 2.18 GB
Inactive: 679 MB
Wired: 1.09 GB
Page-ins: 3.95 GB
Page-outs: 0 B
Look forward to seeing you soon! 🙂

Here other related performance/repair User Tips, your best using a combination of the above and below to solve your problems.
Update your browser plugins!

Tune up your network
Make backups before disaster strikes!