Many thanks for your reply. Have run the Etrecheck routine on both the iMac and Mac Pro. Am appending the iMac report only below. The Mac Pro report only identified one Major Issue (No Time Machine back-up) and 4 Minor issues (which were in common with those on the iMac report: unsigned files; 32 bit apps; limited drive access; kernel extensions present). IMAC REPORT EtreCheck version: 5.5.5 (5111) Report generated: 2020-07-17 18:05:18 Download EtreCheck from https://etrecheck.com Runtime: 19:22 Performance: Poor Sandbox: Enabled Full drive access: Disabled Problem: Apps are crashing Description: Mail is crashing Major Issues: Anything that appears on this list needs immediate attention. Software performance problems - Software seems to be causing performance problems. More than one antivirus app - This machine has multiple antivirus apps installed. Minor Issues: These issues do not need immediate attention but they may indicate future problems or opportunities for improvement. Unsigned files - There are unsigned software files installed. Apple has said that unsigned software will not run by default in a future version of the operating system. System modifications - There are a large number of system modifications running in the background. 32-bit Apps - This machine has 32-bits apps will not work on macOS 10.15 "Catalina". Limited drive access - More information may be available with Full Drive Access. Kernel extensions present - This machine has kernel extensions that may not work in the future. Sharing enabled - This machine has sharing services enabled that could be a security risk. Hardware Information: iMac (27-inch, Mid 2011) iMac Model: iMac12,2 3.1 GHz Intel Core i5 (i5-2400) CPU: 4-core 8 RAM - Upgradeable BANK 0/DIMM0 - 4 GB DDR3 1333 BANK 1/DIMM0 - 4 GB DDR3 1333 BANK 0/DIMM1 - Empty BANK 1/DIMM1 - Empty Video Information: AMD Radeon HD 6970M - VRAM: 1024 MB iMac 2560 x 1440 Drives: disk0 - WDC WD1001FALS-403AA0 1.00 TB (Mechanical - 7200 RPM) Internal SATA 3 Gigabit Serial ATA disk0s1 - EFI (MS-DOS FAT32) [EFI] 210 MB disk0s2 - Macintosh HD (Journaled HFS+) 999.35 GB (209.08 GB used) disk0s3 - Recovery HD [Recovery] 650 MB disk1 - SanDisk Cruzer 16.01 GB External USB 480 Mbit/s USB disk1s1 - N*******K (MS-DOS FAT32) 16.01 GB (1.45 GB used) Mounted Volumes: disk0s2 - Macintosh HD 999.35 GB (209.08 GB used, 807.84 GB available, 790.00 GB free) Journaled HFS+ Mount point: / disk1s1 - N*******K 16.01 GB (1.45 GB used, 14.55 GB free) MS-DOS FAT32 Mount point: /Volumes/N*******K Network: Interface en0: Ethernet Interface en5: iPhone Interface fw0: FireWire Interface en1: Wi-Fi 802.11 a/b/g/n Interface en4: Bluetooth PAN Interface bridge0: Thunderbolt Bridge Printer sharing: Enabled System Software: macOS High Sierra 10.13.6 (17G13035) Time since boot: Less than an hour Notifications: Notifications not available without Full Drive Access. Security: System Status Gatekeeper: Enabled System Integrity Protection: Enabled Antivirus software: CleanMyMac, Trusteer, Apple, and F-Secure Printer sharing: Enabled Unsigned Files: Launchd: /Library/LaunchDaemons/com.f-secure.fscsafesettingsd.plist Executable: /usr/local/f-secure/bin/fscsafesettingsd.xpc/Contents/MacOS/fscsafesettingsd Details: Executable file is not accessible without Full Drive Access Launchd: /Library/LaunchDaemons/com.f-secure.fscsafeadmind.plist Executable: /usr/local/f-secure/bin/fscsafeadmind.xpc/Contents/MacOS/fscsafeadmind Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchDaemons/com.f-secure.fsctelemetryd.plist Executable: /usr/local/f-secure/bin/fsctelemetryd.xpc/Contents/MacOS/fsctelemetryd Details: Executable file is not accessible without Full Drive Access Launchd: /Library/LaunchAgents/com.epson.epw.agent.plist Executable: /Library/Printers/EPSON/InkjetPrinter/EPW/IJEPWAgent.app/Contents/MacOS/IJEPWAgent Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchAgents/com.f-secure.relauncher.plist Executable: /usr/local/f-secure/bin/relaunch Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchAgents/com.xrite.device.softwareupdate.plist Executable: /Library/Application Support/X-Rite/Frameworks/XRiteDevice.framework/Versions/B/Resources/XRD Software Update.app/Contents/MacOS/XRD Software Update Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchAgents/com.xrite.colormunkitray.plist Executable: /Library/Application Support/Colormunki/Photo/Tools/ColorMunki Photo Tray.app/Contents/Scripts/createLoginItem.sh Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchDaemons/com.adobe.SwitchBoard.plist Executable: /Library/Application Support/Adobe/SwitchBoard/SwitchBoard.app/Contents/MacOS/launch.switchboard Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchDaemons/com.f-secure.fsmac.guts2downloader.plist Executable: /usr/local/f-secure/bin/fsupdated_guts2 --download Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchAgents/com.wacom.pentablet.plist Executable: /Library/Application Support/Tablet/PenTabletSpringboard Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchDaemons/com.f-secure.orspclient.plist Executable: /usr/local/f-secure/bin/orspwrapper.sh --daas2-data ./orspclient/etc --http-port 0 Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchAgents/com.xrite.device.message.plist Executable: /Library/Application Support/X-Rite/Devices/message.app/Contents/MacOS/message Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchAgents/com.sony.SonyAutoLauncher.agent.plist Executable: /Library/Application Support/Sony Application Launcher/SonyAutoLauncher.app/Contents/MacOS/SonyAutoLauncher Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchDaemons/com.f-secure.fsmac.licensetool.plist Executable: /usr/local/f-secure/bin/launchd_wrapper com.f-secure.fsmac.licensetool /usr/local/f-secure/fssp/bin/licensetool --update Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchDaemons/com.xrite.device.xrdd.plist Executable: /Library/Application Support/X-Rite/Frameworks/XRiteDevice.framework/Versions/B/Resources/xrdd Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchAgents/com.xrite.colormunkid.plist Executable: /Library/Frameworks/XRiteColorCore.framework/Versions/A/Resources/colormunkid Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchDaemons/com.f-secure.fsmac.fsupdated_guts2.plist Executable: /usr/local/f-secure/bin/fsupdated_guts2 Details: Exact match found in the whitelist - probably OK Launchd: /Library/LaunchDaemons/com.datarobotics.ddserviced.plist Executable: /Library/Application Support/Data Robotics/Drobo Dashboard/DDServiced Details: Exact match found in the whitelist - probably OK Running app: /Library/Application Support/Colormunki/Photo/Tools/ColorMunki Photo Tray.app/Contents/MacOS/ColorMunki Photo Tray Running app: /Library/Application Support/Tablet/PenTabletDriver.app/Contents/Resources/ConsumerTouchDriver.app/Contents/MacOS/ConsumerTouchDriver Running app: /Library/Application Support/Tablet/PenTabletDriver.app/Contents/Resources/TabletDriver.app/Contents/MacOS/TabletDriver Plugin: /Library/Internet Plug-Ins/WacomNetscape.plugin Plugin: /Library/Internet Plug-Ins/WacomTabletPlugin.plugin Apps: 14 32-bit Applications: 70 32-bit apps Kernel Extensions: /Library/Extensions TrustedDataSCSIDriver.kext (1.9.1 - SDK 10.10) DroboTBT.kext (1.4 - SDK 10.10) XFENCE.kext (2.0.58f2 - SDK 10.12) System Launch Agents: [Not Loaded] 16 Apple tasks [Loaded] 171 Apple tasks [Running] 107 Apple tasks System Launch Daemons: [Not Loaded] 37 Apple tasks [Loaded] 185 Apple tasks [Running] 114 Apple tasks [Other] One Apple task Launch Agents: [Not Loaded] com.adobe.AAM.Updater-1.0.plist (Adobe Systems, Inc. - installed 2019-08-18) [Running] com.adobe.AdobeCreativeCloud.plist (Adobe Inc. - installed 2020-07-15) [Running] com.adobe.GC.AGM.plist (Adobe Systems, Inc. - installed 2020-07-14) [Running] com.adobe.GC.Invoker-1.0.plist (Adobe Systems, Inc. - installed 2020-07-14) [Loaded] com.adobe.ccxprocess.plist (Apple - installed 2020-07-01) [Running] com.epson.epw.agent.plist (? 7c4cf380 - installed 2011-04-22) [Running] com.f-secure.freedome.gui.plist (F-Secure Corporation - installed 2020-03-06) [Running] com.f-secure.fsmac.gui.plist (F-Secure Corporation - installed 2020-06-25) [Loaded] com.f-secure.relauncher.plist (? 828eee6e - installed 2020-06-04) [Running] com.google.keystone.agent.plist (Google, Inc. - installed 2020-03-12) [Running] com.google.keystone.xpcservice.plist (Google, Inc. - installed 2020-03-12) [Running] com.sony.SonyAutoLauncher.agent.plist (? a756a1bd - installed 2014-06-25) [Running] com.trusteer.rapport.rapportd.plist (Trusteer LTD - installed 2019-10-27) [Running] com.wacom.pentablet.plist (? ace6eaba - installed 2013-09-03) [Running] com.xrite.colormunkid.plist (? 0 - installed 2014-10-24) [Loaded] com.xrite.colormunkitray.plist (? 0 - installed 2016-11-30) [Running] com.xrite.device.message.plist (? 0 - installed 2014-10-24) [Loaded] com.xrite.device.softwareupdate.plist (? 2f2d6b43 - installed 2015-09-18) Launch Daemons: [Loaded] com.adobe.SwitchBoard.plist (? 856489a3 - installed 2011-10-05) [Running] com.adobe.acc.installer.v2.plist (Adobe Inc. - installed 2020-07-15) [Running] com.adobe.agsservice.plist (Adobe Systems, Inc. - installed 2020-07-14) [Loaded] com.adobe.fpsaud.plist (Adobe Inc. - installed 2020-06-23) [Running] com.datarobotics.ddservice64d.plist (Drobo, Inc. - installed 2019-11-25) [Running] com.datarobotics.ddserviced.plist (? 5ae83f29 - installed 2016-03-29) [Other] com.f-secure.XFENCEDaemon.plist (F-Secure Corporation - installed 2020-06-09) [Loaded] com.f-secure.freedome.uninstall.plist (F-Secure Corporation - installed 2020-03-06) [Loaded] com.f-secure.fsavd.dbhelper.plist (F-Secure Corporation - installed 2020-06-09) [Other] com.f-secure.fsavd.plist (F-Secure Corporation - installed 2020-06-09) [Running] com.f-secure.fscsafeadmind.plist (? 905e31b7 - installed 2020-06-04) [Running] com.f-secure.fscsafesettingsd.plist (? 4528fe9c - installed 2020-06-04) [Running] com.f-secure.fsctelemetryd.plist (? f12dddcd - installed 2020-06-04) [Loaded] com.f-secure.fsmac.fsupdated_guts2.plist (? 9d885777 - installed 2020-06-04) [Loaded] com.f-secure.fsmac.guts2downloader.plist (? bb54cf35 - installed 2020-06-04) [Loaded] com.f-secure.fsmac.licensetool.plist (? 74c94ac7 - installed 2020-06-04) [Running] com.f-secure.fsvpn-service-helper.production.plist (F-Secure Corporation - installed 2020-01-23) [Running] com.f-secure.fsvpn-service.production.plist (F-Secure Corporation - installed 2020-03-06) [Running] com.f-secure.fsvpn-upstream.production.plist (F-Secure Corporation - installed 2020-03-06) [Running] com.f-secure.orspclient.plist (? 4d2e8df8 - installed 2020-06-04) [Loaded] com.google.keystone.daemon.plist (Google, Inc. - installed 2020-03-12) [Loaded] com.macpaw.CleanMyMac3.Agent.plist (MacPaw Inc. - installed 2018-09-10) [Running] com.trusteer.rooks.rooksd.plist (Trusteer LTD - installed 2019-10-27) [Running] com.xrite.device.xrdd.plist (? 28f4ae75 - installed 2015-09-18) User Launch Agents: [Loaded] com.adobe.AAM.Updater-1.0.plist (Adobe Systems, Inc. - installed 2011-10-05) [Loaded] com.dropbox.DropboxMacUpdate.agent.plist (Dropbox, Inc. - installed 2019-08-21) [Running] com.hp.devicemonitor.plist (HP Inc. - installed 2020-07-17) [Running] com.hp.productresearch.plist (HP Inc. - installed 2020-07-17) [Loaded] com.macpaw.CleanMyMac3.Scheduler.plist (MacPaw Inc. - installed 2017-08-11) User Login Items: [Not Loaded] PhotoStreamAgent (App Store - installed 2018-09-10) Modern Login Item /Applications/iPhoto.app/Contents/Library/LoginItems/PhotoStreamAgent.app [Not Loaded] HP Device Monitor (HP Inc. - installed 2018-09-10) Modern Login Item /Library/Printers/hp/Frameworks/HPDeviceMonitoring.framework/Versions/1.0/Helpers/HP Device Monitor Manager.app/Contents/Library/LoginItems/HP Device Monitor.app [Not Loaded] HP Product Research (HP Inc. - installed 2018-03-15) Modern Login Item /Library/Printers/hp/Utilities/HPPU Plugins/ProductImprovementStudy.hptask/Contents/Helpers/HP Product Research Manager.app/Contents/Library/LoginItems/HP Product Research.app [Not Loaded] HP Data Uploader (HP Inc. - installed 2018-03-15) Modern Login Item /Library/Printers/hp/Utilities/HPPU Plugins/ProductImprovementStudy.hptask/Contents/Helpers/HP Product Research Manager.app/Contents/Library/LoginItems/HP Product Research.app/Contents/Resources/HP Data Uploader.app Internet Plug-ins: JavaAppletPlugin: 15.0.1 (Apple - installed 2011-11-21) FlashPlayer-10.6: 32.0.0.403 (Adobe Inc. - installed 2020-07-14) AdobeAAMDetect: 3.0.0.0 (Adobe Inc. - installed 2020-07-15) Flash Player: 32.0.0.403 (Adobe Inc. - installed 2020-07-14) WacomNetscape: 2.1.0-1 (? - installed 2014-07-07) ZoomUsPlugIn: 5.0.2 (24030.0508) (Zoom Video Communications, Inc. - installed 2020-05-12) WacomTabletPlugin: WacomTabletPlugin 2.1.0.2 (? - installed 2014-07-07) iPhotoPhotocast: 7.0 (Apple - installed 2013-06-17) User Internet Plug-ins: User Internet Plug-ins need Full Drive Access Audio Plug-ins: AppleTimeSyncAudioClock: 1.0 (Apple - installed 2020-07-01) iSightAudio: 7.7.3 (Apple - installed 2020-07-01) BridgeAudioSP: 4.69.2 (Apple - installed 2020-07-01) AppleAVBAudio: 683.1 (Apple - installed 2020-07-01) ZoomAudioDevice: 1.0 (Zoom Video Communications, Inc. - installed 2020-06-02) BluetoothAudioPlugIn: 6.0.7 (Apple - installed 2020-07-01) AirPlay: 2.0 (Apple - installed 2020-07-01) User Audio Plug-ins: User Audio Plug-ins need Full Drive Access User iTunes Plug-ins: User iTunes Plug-ins need Full Drive Access Safari Extensions: Browsing protection (F-Secure Corporation - installed 2020-06-25) Rapport Content Blocker (Trusteer LTD - installed 2020-01-28) Rapport Extension (Trusteer LTD - installed 2020-01-28) 3rd Party Preference Panes: Safe Anywhere Mac Settings (F-Secure Corporation - installed 2020-06-25) Flash Player (Adobe Inc. - installed 2020-06-23) Trusteer Endpoint Protection (Trusteer LTD - installed 2020-03-05) Time Machine: Time Machine information not available without Full Drive Access. Performance: System Load: 1.78 (1 min ago) 2.21 (5 min ago) 1.34 (15 min ago) Nominal I/O speed: 4.65 MB/s File system: 121.00 seconds (timed out) Write speed: 54 MB/s Read speed: 54 MB/s CPU Usage Snapshot: Type Overall System: 11 % User: 15 % Idle: 74 % Top Processes Snapshot by CPU: Process (count) CPU (Source - Location) Other processes 71.24 % (?) secd 22.00 % (Apple) EtreCheck 4.79 % (App Store) trustd 3.30 % (Apple) Dropbox 0.38 % (Dropbox, Inc.) Top Processes Snapshot by Memory: Process (count) RAM usage (Source - Location) EtreCheck 571 MB (App Store) Dropbox 319 MB (Dropbox, Inc.) Backup and Sync 188 MB (Google, Inc.) rapportd 87 MB (Trusteer LTD) Freedome 87 MB (F-Secure Corporation) Top Processes Snapshot by Network Use: Process (count) Input / Output (Source - Location) Dropbox 71 KB / 161 KB (Dropbox, Inc.) Other processes 133 KB / 81 KB (?) SystemUIServer 0 B / 160 B (Apple) backgroundtaskmanagementagent 0 B / 0 B (Apple) GoogleSoftwareUpdateAgent 0 B / 0 B (Google, Inc.) Virtual Memory Information: Physical RAM: 8 GB Free RAM: 16 MB Used RAM: 4.48 GB Cached files: 3.50 GB Available RAM: 3.52 GB Swap Used: 0 B Software Installs (past 30 days): Install Date Name (Version) 2020-06-26 MRTConfigData (1.63) 2020-07-01 Security Update 2020-003 (10.13.6) 2020-07-04 Safari (13.1.1) 2020-07-14 Adobe Flash Player 2020-07-14 XProtectPlistConfigData (2126) 2020-07-15 EtreCheck (5.5.5) Diagnostics Information (past 7-30 days): Directory /Library/Logs/DiagnosticReports is not accessible. Enable Full Drive Access to see more information. End of report GRATEFUL FOR YOUR FURTHER ATTENTION AND FURTHER ADVICES.