EtreCheck below. Hearing upgrading the Hard Drive may be one solution.
Hardware Information:
iMac (24-inch Mid 2007)
iMac - model: iMac7,1
1 2.8 GHz Intel Core 2 Duo CPU: 2 cores
3 GB RAM
Video Information:
ATI,RadeonHD2600 - VRAM: 256 MB
System Software:
Mac OS X 10.6.8 (10K549) - Uptime: 1 day 2:59:42
Disk Information:
Hitachi HDT725032VLA360 disk0 : (298.09 GB)
(null) (disk0s1) <not mounted>: 200 MB
Simply Art (disk0s2) / [Startup]: 297.77 GB (216.48 GB free)
USB Information:
Apple, Inc. Keyboard Hub
Mitsumi Electric Apple Optical USB Mouse
Apple, Inc Apple Keyboard
LaCie LaCie HD Drive 232.89 GB
(null) (disk2s1) <not mounted>: 32 KB
(null) (disk2s2) <not mounted>: 64 KB
(null) (disk2s3) <not mounted>: 64 KB
(null) (disk2s4) <not mounted>: 112 KB
2006-2009 Simply Smashing Arhive (disk2s6) /Volumes/2006-2009 Simply Smashing Arhive: 232.89 GB (65.8 GB free)
Apple Inc. Built-in iSight
SanDisk Cruzer Glide 7.45 GB
SIMPLY ART (disk1s1) /Volumes/SIMPLY ART 1: 7.45 GB (7.24 GB free)
Apple Inc. Bluetooth USB Host Controller
Apple Computer, Inc. IR Receiver
Thunderbolt Information:
Kernel Extensions:
[not loaded] com.Immersion.driver.ImmersionForceFeedback (1.0.7) Support
[not loaded] com.acard.driver.ACard6280ATA (1.0.5) Support
[not loaded] com.acard.driver.ACard62xxM (2.0.6) Support
[not loaded] com.acard.driver.ACard67162 (2.0.3) Support
[not loaded] com.acard.driver.ACard671xSCSI (2.0.1) Support
[not loaded] com.acard.driver.ACard6885M (2.0.6) Support
[not loaded] com.acard.driver.ACard68xxM (2.0.5) Support
[not loaded] com.logitech.driver.LogitechForceFeedback (1.0.3) Support
[not loaded] com.paceap.kext.pacesupport.leopard (5.5.1) Support
[not loaded] com.paceap.kext.pacesupport.master (5.5.1) Support
[not loaded] com.paceap.kext.pacesupport.panther (5.5.1) Support
[not loaded] com.paceap.kext.pacesupport.tiger (5.5.1) Support
[not loaded] com.wacom.kext.wacomtablet (6.1.0) Support
Problem System Launch Daemons:
[failed] com.apple.suhelperd.plist
[not loaded] org.samba.winbindd.plist Support
Problem System Launch Agents:
[failed] com.apple.Kerberos.renew.plist
Launch Daemons:
[loaded] com.adobe.fpsaud.plist Support
[loaded] com.adobe.SwitchBoard.plist Support
[running] com.aladdin.aksusbd.plist Support
[failed] PACESupport.plist Support
Launch Agents:
[not loaded] com.adobe.AAM.Updater-1.0.plist Support
[loaded] com.adobe.CS5ServiceManager.plist Support
[running] com.canon.MFManager.plist Support
[running] com.extensis.FMCore.plist Support
[running] com.wacom.wacomtablet.plist Support
User Launch Agents:
[loaded] com.adobe.AAM.Updater-1.0.plist Support
[loaded] com.adobe.ARM.[...].plist Support
[loaded] com.adobe.ARM.[...].plist Support
User Login Items:
GrowlMenu
QuickPopup
Simply Art Data
Suitcase Fusion 5
HP Product Research
HP Scheduler
Internet Plug-ins:
WacomSafari: Version: (null) Support
AdobeExManDetect: Version: AdobeExManDetect 1.1.0.0 - SDK 10.7 Support
Flip4Mac WMV Plugin: Version: 2.2.3.7 Support
AdobeAAMDetect: Version: AdobeAAMDetect 1.0.0.0 - SDK 10.6 Support
FlashPlayer-10.6: Version: 13.0.0.206 - SDK 10.6 Support
AdobePDFViewerNPAPI: Version: 11.0.06 - SDK 10.6 Support
Silverlight: Version: 5.1.10411.0 - SDK 10.6 Support
Flash Player: Version: 13.0.0.206 - SDK 10.6 Support
QuickTime Plugin: Version: 7.6.6
iPhotoPhotocast: Version: 7.0
AdobePDFViewer: Version: 11.0.06 - SDK 10.6 Support
JavaAppletPlugin: Version: 13.9.8 - SDK 10.6 Check version
iTunes Plug-ins:
Quartz Composer Visualizer: Version: 1.2
User Internet Plug-ins:
CitrixOnlineWebDeploymentPlugin: Version: 1.0.105 Support
WebEx64: Version: 1.0 - SDK 10.6 Support
3rd Party Preference Panes:
Flash Player Support
Flip4Mac WMV Support
Growl Support
StuffIt AVR Support
WacomTablet Support
Top Processes by CPU:
4% Safari
3% WindowServer
2% WebProcess
2% Adobe Photoshop CC
1% QuickPopup
Top Processes by Memory:
488 MB Adobe Illustrator
464 MB Adobe Photoshop CC
138 MB Mail
126 MB WebProcess
77 MB Safari
Virtual Memory Information:
132 MB Free RAM
1.79 GB Active RAM
836 MB Inactive RAM
267 MB Wired RAM
2.00 GB Page-ins
329 MB Page-outs