Slow start up shutdown and running

[djinferno]

I have 15-inch, Early 2011 macbook pro
Processor 2 GHz Intel Core i7
Memory 16 GB 1333 MHz DDR3
500 GB
SATA Disk with 390 gb free
Mountain Lion

my macbook is taking a very long time to shutdown and to load up from grey screen... I have tried almost every fix or solution in the forums but i am still getting slows speeds.. also getting freezing using safari or chrome and freezing of wifi connection... i am a mac novice and really need some help please

 

[GGJstudios]

Check the following locations for apps that automatically launch on startup and delete any you don't need/want:

• System Preferences > Accounts > yourusername > Login Items
  (Lion and ML users: System Preferences > Users & Groups > yourusername > Login Items)
  
  
• /Library/LaunchAgents/
  (Lion and ML users: In Finder, click Go > Go to Folder > then enter the path above)
  
  
• ~/Library/LaunchAgents/
  (Lion and ML users: In Finder, click Go > Go to Folder > then enter the path above)
  
  
• /Library/StartupItems/
  (Lion and ML users: In Finder, click Go > Go to Folder > then enter the path above)

If you're having performance issues, this may help:

Performance Tips For Mac OS X​

 

[palmharbor]

Cache

Go to Go menu hold down option key library appears....find Cache...drag it to desktop...restart computer see if it improves with browsers etc. If better, trash cache

 

[GGJstudios]

Go to Go menu hold down option key library appears....find Cache...drag it to desktop...restart computer see if it improves with browsers etc. If better, trash cache

There is no need to do that, and it will only hurt performance, as system resources will be consumed while rebuilding all the caches. Caches exist to improve performance. As for the browser's cache, that can be emptied from the browser.

 

[KevinGrabher]

Open Disk Utility (loacted in Appliations -> Utilites) and hit "check volume" on the Drive, as well as the volume (usually "Macintosh HD") just to make sure that your filesystem isn't corrupt

 

[djinferno]

done all that ... did not clear cache as i was told no need for mac... but still sluggish and takes a long time to boot... i have almost 400gb free hdd space and 16 gb ram so it shouldnt be slow