I couldn't see a big difference between the two accounts' preferences so the problem must be somewhere else.
Here's the report. I will appreciate very much any comments, conclusions, guess..
EtreCheck version: 5.3 (5031)
Report generated: 2019-07-03 07:25:37
Download EtreCheck from https://etrecheck.com
Runtime: 4:30
Performance: Good
Sandbox: Enabled
Full drive access: Disabled
Problem: Apps are crashing
Description:
Safari shuts down unexpectedly.
Major Issues:
Anything that appears on this list needs immediate attention.
No Time Machine backup - Time Machine backup not found.
Obsolete hardware - This machine may be considered obsolete.
Minor Issues:
These issues do not need immediate attention but they may indicate future problems or opportunities for improvement.
Upgradeable hard drive - This machine’s hard drive could be replaced with an SSD. This would dramatically improve your machine’s performance.
Upgradeable RAM - This machine has upgradeable RAM that would help its performance.
Limited drive access - More information may be available with Full Drive Access.
Hardware Information:
MacBook Pro (15-inch, Mid 2010) - Obsolete!
MacBook Pro Model: MacBookPro6,2
1 2,4 GHz Intel Core i5 (i5) CPU: 2-core
4 GB RAM - Upgradeable
BANK 0/DIMM0 - 2 GB DDR3 1067 ok
BANK 1/DIMM0 - 2 GB DDR3 1067 ok
Battery: Health = Normal - Cycle count = 583
Video Information:
Intel HD Graphics - VRAM: 288 MB
Color LCD 1440 x 900
NVIDIA GeForce GT 330M - VRAM: 256 MB
Drives:
disk0 - ST9320325ASG 320.07 GB (Mechanical - 5400 RPM)
Internal SATA 1.5 Gigabit Serial ATA
disk0s1 - EFI (MS-DOS FAT32) [EFI] 210 MB
disk0s2 [Core Storage Container] 319.08 GB
disk1 - Macintosh HD (Journaled HFS+) 318.71 GB (31.38 GB used)
disk0s3 - Recovery HD [Recovery] 650 MB
Mounted Volumes:
disk1 - Macintosh HD
318.71 GB (31.38 GB used - 287.07 GB free)
Journaled HFS+
Mount point: /
Network:
Interface Bluetooth-Modem: Bluetooth DUN
Interface en0: Ethernet
Interface fw0: FireWire
Interface en1: Wi-Fi
802.11 a/b/g/n
Interface en2: Bluetooth PAN
System Software:
macOS High Sierra 10.13.6 (17G7024)
Time since boot: Less than an hour
Notifications:
Notifications not available without Full Drive Access.
Security:
Gatekeeper: Enabled
System Integrity Protection: Enabled
System Launch Agents:
[Not Loaded] 17 Apple tasks
[Loaded] 178 Apple tasks
[Running] 99 Apple tasks
System Launch Daemons:
[Not Loaded] 38 Apple tasks
[Loaded] 196 Apple tasks
[Running] 102 Apple tasks
Launch Agents:
[Other] com.adobe.ARMDCHelper.cc24aef4a1b90ed56a725c38014c95072f92651fb65e1bf9c8e43c37a23d420d.plist (Adobe Systems, Inc. - installed 2019-03-29)
Launch Daemons:
[Loaded] com.adobe.ARMDC.Communicator.plist (Adobe Systems, Inc. - installed 2019-03-29)
[Loaded] com.adobe.ARMDC.SMJobBlessHelper.plist (Adobe Systems, Inc. - installed 2019-03-29)
[Loaded] com.adobe.fpsaud.plist (Adobe Systems, Inc. - installed 2019-05-27)
User Login Items:
iTunesHelper.app (Apple - installed 2019-04-14)
(Application - /Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Internet Plug-ins:
AdobePDFViewerNPAPI: 17.012.20098 (Adobe Systems, Inc. - installed 2019-05-17)
FlashPlayer-10.6: 32.0.0.207 (Adobe Systems, Inc. - installed 2019-06-27)
Flash Player: 32.0.0.207 (Adobe Systems, Inc. - installed 2019-06-27)
AdobePDFViewer: 19.012.20034 (Adobe Systems, Inc. - installed 2019-05-17)
Audio Plug-ins:
BluetoothAudioPlugIn: 6.0.7 (Apple - installed 2019-05-28)
iSightAudio: 7.7.3 (Apple - installed 2019-05-28)
AirPlay: 2.0 (Apple - installed 2019-05-28)
AppleAVBAudio: 683.1 (Apple - installed 2019-05-28)
BridgeAudioSP: 4.69.2 (Apple - installed 2019-05-28)
AppleTimeSyncAudioClock: 1.0 (Apple - installed 2019-05-28)
3rd Party Preference Panes:
Flash Player (installed 2019-05-27)