I've been doing that and it works at times, but just now my computer wouldn't let me log out of the main account I use. Here is the report I ran during the time the computer won't shut down:
Problem description:
computer won’t shut down
EtreCheck version: 2.2 (132)
Report generated 6/16/15, 10:41 AM
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Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
iMac (27-inch, Late 2013) (Technical Specifications)
iMac - model: iMac14,2
1 3.4 GHz Intel Core i5 CPU: 4-core
8 GB RAM Upgradeable
BANK 0/DIMM0
4 GB DDR3 1600 MHz ok
BANK 1/DIMM0
4 GB DDR3 1600 MHz ok
BANK 0/DIMM1
Empty
BANK 1/DIMM1
Empty
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en1: 802.11 a/b/g/n/ac
Video Information: ℹ️
NVIDIA GeForce GTX 775M - VRAM: 2048 MB
iMac 2560 x 1440
System Software: ℹ️
OS X 10.10.3 (14D131) - Time since boot: 2:6:45
Disk Information: ℹ️
APPLE HDD ST1000DM003 disk0 : (1 TB)
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / : 999.35 GB (398.37 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
USB Information: ℹ️
VIA Labs, Inc. USB3.0 Hub
HGST G-DRIVE mobile USB 7200 1 TB
EFI (disk2s1) <not mounted> : 210 MB
(disk2s2) /Volumes/ : 999.86 GB (970.51 GB free)
Seagate BUP Slim Mac SL 2 TB
EFI (disk1s1) <not mounted> : 210 MB
Thomas iMac 2-6-2015 (disk1s2) /Volumes/Thomas iMac 2-6-2015 : 2.00 TB (1.37 TB free)
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. FaceTime HD Camera (Built-in)
VIA Labs, Inc. USB2.0 Hub
Apple Inc. MacBook Air SuperDrive
Firewire Information: ℹ️
Focusrite SAFFIRE_PRO_40 400mbit - 400mbit max
Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus
Apple Inc. Thunderbolt to FireWire Adapter
Gatekeeper: ℹ️
Mac App Store and identified developers
Kernel Extensions: ℹ️
/Library/Extensions
[not loaded] com.Avid.driver.AvidDX (5.9.1 - SDK 10.8) [Click for support]
/System/Library/Extensions
[loaded] com.digidesign.iokit.DigiDal (11.3.0f4 - SDK 10.8) [Click for support]
[not loaded] com.digidesign.usb.elevenrack.driver (1.0.1) [Click for support]
[not loaded] com.paceap.kext.pacesupport.master (5.9.1 - SDK 10.6) [Click for support]
[loaded] tc.tctechnologies.driver.Saffire (4.1.4 18735 - SDK 10.6) [Click for support]
/System/Library/Extensions/PACESupportFamily.kext/Contents/PlugIns
[not loaded] com.paceap.kext.pacesupport.leopard (5.9.1 - SDK 10.4) [Click for support]
[not loaded] com.paceap.kext.pacesupport.panther (5.9.1 - SDK 10.-1) [Click for support]
[loaded] com.paceap.kext.pacesupport.snowleopard (5.9.1 - SDK 10.6) [Click for support]
[not loaded] com.paceap.kext.pacesupport.tiger (5.9.1 - SDK 10.4) [Click for support]
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist [Click for support]
[loaded] com.avid.bsd.shoe.plist [Click for support]
[running] com.digidesign.elevenrack.helper.plist [Click for support]
[running] com.paceap.eden.licensed.plist [Click for support]
[loaded] PACESupport.plist [Click for support]
[loaded] tc.tctechnologies.Saffire.plist [Click for support]
User Login Items: ℹ️
iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Internet Plug-ins: ℹ️
Silverlight: Version: 5.1.40416.0 - SDK 10.6 [Click for support]
FlashPlayer-10.6: Version: 18.0.0.160 - SDK 10.6 [Click for support]
Flash Player: Version: 18.0.0.160 - SDK 10.6 [Click for support]
QuickTime Plugin: Version: 7.7.3
Default Browser: Version: 600 - SDK 10.10
Audio Plug-ins: ℹ️
Avid CoreAudio: Version: 11.3.0.327 - SDK 10.8 [Click for support]
3rd Party Preference Panes: ℹ️
Digidesign Eleven Rack [Click for support]
Flash Player [Click for support]
Time Machine: ℹ️
Mobile backups: OFF
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 999.35 GB Disk used: 600.98 GB
Destinations:
Thomas iMac 2-6-2015 [Local]
Total size: 2.00 TB
Total number of backups: 34
Oldest backup: 2015-02-07 16:17:47 +0000
Last backup: 2015-06-16 17:03:50 +0000
Size of backup disk: Adequate
Backup size 2.00 TB > (Disk used 600.98 GB X 3)
Top Processes by CPU: ℹ️
3% WindowServer
2% fontd
0% taskgated
0% cloudpaird
Top Processes by Memory: ℹ️
714 MB kernel_task
123 MB mdworker(5)
106 MB mds_stores
106 MB WindowServer
74 MB VTDecoderXPCService(2)
Virtual Memory Information: ℹ️
2.86 GB Free RAM
5.13 GB Used RAM
0 B Swap Used
Diagnostics Information: ℹ️
Jun 16, 2015, 08:33:29 AM Self test - passed