Hi there,
good news here: I just called Apple Support and the guy helped wonderfully!
What you gotta essencially do is: open the finder and then, from the menu bar, click on Go and Computer. In the window that pops up choose the column view and click on Macintosh HD, Library. In this folder you have to move to the trash the content of the following folders:
- Caches;
- LaunchAgents;
- LaunchDaemons;
- StartupItems.
Before acting the deleting be sure to copy the last three folders on the desktop, in a way to save a copy of their files.
You have to move another element to the trash and it's something called like com.apple.windowserver.plist and you can find this one guy in the Preferences folder (always in the Library one).
Once done, DO NOT EMPTY THE BIN but close the Finder and go on the menu bar again and click on Go; while pressing the Alt/Option button, click on the Library voice (which is hidden and will appear only by pressing Alt). When opened, you have to do something similar to the other time; so
- Look for Caches folder and move the content to the bin;
- Look for the Internet Plug-ins folder and do the same;
- Again for the LaunchAgents folder (you don't need to save a backup of the files this one time);
- Move on to Preferences and look if the com.apple.windowserver.plist is present. If not, go back to the Library folder;
- Last, choose the Saved Application State folder and move the content to the bin.
Ok, now again DO NOT EMPTY THE TRASH but restart the computer. You should now have everything working as it was when you got the Mac.
Unfortunately I don't know if this will work for you and I don't wanna assume any responsibility for problems but it worked for me and my MBP is now superfast again.
Hope your one will be ok again and this post will help the others who could encounter the same issues 🙂
