macOS High Sierra freeze on iMac late 2009

For the last few months my wife 27" iMac with El Capitan is freezing using finder and random applications, mouse moving but the only way is to restart the computer as nothing responding.

I had that issue on my 27" 2010 iMac and after clean install of High Sierra, SSD and ram upgrade i didn't had any issues (it was two weeks ago). hoping it will solve my wife iMac freezing issues i have upgrade her computer to SSD

,did a fresh install to High Sierra and reset the SMC but the same freezing issues. the freezing is random but also when she use high demanding application scetchup and vector works. i have ssh runing htop and can see the CPU reaching full usage whit random application. i run EtreCheck it say the system is obsolete see attached report. at the moment it has 8GiG Ram the only thing i can think is to upgrade the ram to 16GiG (if this model supported ?)

Hope if anyone can help check the report and see if you can suggest a solution

Thank you

EtreCheck version: 4.0.4 (4A150)

Report generated: 2018-02-26 10:56:06

Download EtreCheck from https://etrecheck.com

Runtime: 2:44

Performance: Excellent

Problem:Other problem

Major Issues:

Anything that appears on this list needs immediate attention.

Obsolete hardware - This machine may be considered obsolete.

Minor Issues:

These issues do not need immediate attention but they may indicate future problems.

Unsigned files - There is unsigned software installed. It appears to be legitimate but should be reviewed.

Hardware Information:

iMac (27-inch, Late 2009) - Obsolete!

iMac Model: iMac10,1

1 3.06 GHz Intel Core 2 Duo (Duo) CPU: 2-core

8 RAM Upgradeable

BANK 0/DIMM0

2 GB DDR3 1067 ok

BANK 1/DIMM0

2 GB DDR3 1067 ok

BANK 0/DIMM1

2 GB DDR3 1067 ok

BANK 1/DIMM1

2 GB DDR3 1067 ok

Video Information:

ATI Radeon HD 4670 - VRAM: 256 MB

iMac 2560 x 1440

Drives:

disk0 - INTEL SSDSC2KW120H6 120.03 GB (Solid State - TRIM: No)

Internal SATA 3 Gigabit Serial ATA

disk0s1 - EFI (MS-DOS FAT32) [EFI] 210 MB

disk0s2 119.82 GB

disk1s1 - I*******D (APFS) 119.82 GB 52.55 GB

disk1s2 - Preboot (APFS) [APFS Preboot] 119.82 GB 38 MB

disk1s3 - Recovery (APFS) [Recovery] 119.82 GB 1.01 GB

disk1s4 - VM (APFS) [APFS VM] 119.82 GB 20 KB

Mounted Volumes:

disk1s1 - I*******D 119.82 GB (66.10 GB free)

APFS

Mount point: /

disk1s4 - VM [APFS VM] 119.82 GB (66.10 GB free)

APFS

Mount point: /private/var/vm

Network:

Interface en0: Ethernet

Interface fw0: FireWire

Interface en1: Wi-Fi

802.11 a/b/g/n

One IPv4 address

Interface en2: Bluetooth PAN

iCloud Quota: 9.83 GB available

System Software:

macOS High Sierra 10.13.3 (17D102)

Time since boot: About an hour

System Load: 4.89 (1 min ago) 2.39 (5 min ago) 1.97 (15 min ago)

Security:

Unsigned Files:

Launchd: /Library/LaunchDaemons/com.chaos_group.vrol.plist

Executable: /Applications/ChaosGroup/VRLService/OLS/vrol.bin

Details: Exact match found in the whitelist - probably OK

Launchd: /Library/LaunchDaemons/com.chaos_group.swrm.plist

Executable: /Applications/ChaosGroup/V-Ray/Swarm 1.4/swrm.bin

Details: Exact match found in the whitelist - probably OK

System Launch Agents:

System Launch Daemons:

Launch Agents:

Launch Daemons:

User Login Items:

Macs Fan Control Application (Ilya Parniuk

(/Applications/Macs Fan Control.app)

iTunesHelper Application (Apple, Inc. - installed 2018-02-18)

(/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

Internet Plug-ins:

FlashPlayer-10.6: 28.0.0.161 (installed 2018-02-23)

Flash Player: 28.0.0.161 (installed 2018-02-23)

QuickTime Plugin: 7.7.3 (installed 2018-01-19)

PepperFlashPlayer: 28.0.0.161 (installed 2018-02-23)

AdobeAAMDetect: 3.0.0.0 (installed 2018-02-23)

3rd Party Preference Panes:

Flash Player (installed 2018-02-02)

Time Machine:

Skip System Files: No

Mobile backups:

Auto backup: Yes

Volumes being backed up:

I*******D: Disk size: 119.82 GB - Disk used: 53.73 GB

Destinations:

T*********e [Network] (Last used)

Total size: 1.07 TB

Total number of backups: 23

Oldest backup: 2018-02-18 13:00:06

Last backup: 2018-02-26 10:06:18

Top Processes by CPU:

Top Processes by Memory:

Top Processes by Network Use:

Top Processes by Energy Use:

Virtual Memory Information:

Diagnostics Information (past 7 days):

2018-02-26 09:43:46 Safari.app Crash

2018-02-25 20:30:31 vrlservice.bin Crash

2018-02-23 00:33:15 Install Adobe Flash Player.app Crash

2018-02-22 23:02:45 xf-amcs6.app Crash

2018-02-22 16:16:23 SketchUp.app CPU

2018-02-22 11:15:29 findmydeviced Crash

2018-02-22 11:05:14 Firefox.app Crash

2018-02-22 09:13:37 Kernel Kernel Panic

2018-02-20 12:45:10 PrintUITool Crash

2018-02-20 12:15:20 Vectorworks 2018.app CPU

End of report