Macbook Pro Retina 13 with Yosemite Slow Shutdown

Question

Hi everybody,
My rMBP now takes 30 seconds to shutdown. When I click to shutdown It presents the black screen with the wheel.
I never installed the parallels and I already did a snapshot with AdwareMedic:
AdwareMedic 2.2 system report - quinta-feira, 15 de Janeiro de 2015 @ 15:24:59
Mac OS X version 10.10.1
15:24  up 13 mins, 1 user, load averages: 1.19 1.23 0.87
Safari extensions
None
Chrome extensions
None
Firefox extensions
None
Login items
iTunesHelper, Dropbox
Startup items
None
System startup items
None
User launch agents
None
System launch agents
total 8
-rw-r--r--  1 root  wheel  721 Nov 11  2013 org.macosforge.xquartz.startx.plist
System launch daemons
total 24
-rw-r--r--  1 root  wheel  462 Dec 18 04:46 com.adobe.fpsaud.plist
-rw-r--r--  1 root  wheel  568 Aug 25  2010 com.microsoft.office.licensing.helper.plist
-rw-r--r--  1 root  wheel  670 Nov 11  2013 org.macosforge.xquartz.privileged_startx.plist
Third-party kernel extensions
None
User cron tasks
None
Root cron tasks
launchd.conf contents
None
DNS settings
Server: 192.168.1.254
Hosts file
# Host Database
# localhost is used to configure the loopback interface
# when the system is booting.  Do not change this entry.
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1             localhost
Scan log
2015-01-15 15:20:55: ----- Scan Started -----
2015-01-15 15:20:55: Scanning with signatures version 47
2015-01-15 15:21:04: No adware found
2015-01-15 15:21:04: ----- Scan Ended -----
So, everything seems ok but it takes 30 seconds instead of 2-3.
Anyone can help me?
None

Answer 1

Hi Alex,
Thank you very much for your reply. :-)
Actually, I had already checked the alternatives online and the Macbook Pro 13'' is only available with a dual-core processor. No possibility to order it with a quad-core processor. That's why I was wondering if a change/update of the processor can be made afterwards.
Thank you,
NeytiriLuna