very slow when launching apps

how can i find out why my machine has gone so slow. i have recently loaded Catalina 10.15.17

and my Mac became slower although it has 8GRam and the hard disk is only 1/4 utilised.

I restarted my machine and pressed D to start diagnostics but got this message


error: 0X8000000000000003, Cannot load "EFI/Drivers/TestSupport.efi"

Status: 0X00000003

Not sure what to do next. Any help would be appreciated.

iMac 27″, macOS 10.15

Posted on Mar 1, 2021 10:10 AM

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Question marked as Top-ranking reply

Posted on Mar 1, 2021 10:21 AM

One indication of a failing hard disk is a very slow startup . Before you do ANYTHING please backup the computer using Time Machine or create a bootable clone if you run Catalina or earlier. Then test your backup to ensure it works. Once you have the backup completed and verified that it works please do the following:


Please navigate to the Mac App Store or navigate to www.Etrecheck.com and download the free version of EtreCheck. Once you have you downloaded the app and installed it, please run the report and save it. This report will help us get a good idea what has been installed on your system and help us be able to diagnose what may be wrong.


When you have your report, you can attach it when you reply to this message and we can then review it and help you determine what is needed to get your system running well again.


For instructions on how to download your EtreCheck report and attach it to your reply to this message please click https://discussions.apple.com/docs/DOC-250000211



1 reply
Question marked as Top-ranking reply

Mar 1, 2021 10:21 AM in response to RustomHaidar

One indication of a failing hard disk is a very slow startup . Before you do ANYTHING please backup the computer using Time Machine or create a bootable clone if you run Catalina or earlier. Then test your backup to ensure it works. Once you have the backup completed and verified that it works please do the following:


Please navigate to the Mac App Store or navigate to www.Etrecheck.com and download the free version of EtreCheck. Once you have you downloaded the app and installed it, please run the report and save it. This report will help us get a good idea what has been installed on your system and help us be able to diagnose what may be wrong.


When you have your report, you can attach it when you reply to this message and we can then review it and help you determine what is needed to get your system running well again.


For instructions on how to download your EtreCheck report and attach it to your reply to this message please click https://discussions.apple.com/docs/DOC-250000211



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very slow when launching apps

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