iMac running macOS Sequoia 15.7.1 experiencing slow performance and beach balling

My iMac Sequoia 15.7.1 is running very slow and constantly 'beachballing'. Is there a program I can run to see if there is a virus problem or some other problem?



[Re-Titled by Moderator]

Original Title: BeachballingMac

iMac 27″, macOS 15.7

Posted on Nov 3, 2025 3:55 AM

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Question marked as Top-ranking reply

Posted on Nov 3, 2025 5:01 AM

peterfrombridlington wrote:

My iMac Sequoia 15.7.1 is running very slow and constantly 'beachballing'. Is there a program I can run to see if there is a virus problem or some other problem?


[Re-Titled by Moderator]
Original Title: BeachballingMac

1 - Yes, for performance issues


2 - No, for Viruses


To avoid a session of Q&A, Q&A  and Q&A  


A1 - Download the Application Etrecheck  ( External Link ) directly from the Developer.


This is a Diagnostic Tool that makes no changes to the computer.


It makes a coherent and readable inventory of both the Hardware and Software used on the computer 


The application is free or paid for added features. 


The Report will Not Reveal Any Personal Information. 


Post back the Full Report - Share Report >> Copy , then  paste  >>>> using the Additional Text Icon  <<<<


A2 - Windows-like viruses that self-replicate and affect macOS don’t exist because of the underlying UNIX Foundation and permission limitations.


The macOS operating system resides in a sealed and read-only volume that can’t be opened by users or third-party applications.


Mac app security enhancements are sufficient to protect computers from malware.


Adware and Malware can affect computers and are often downloaded from “shady” websites or developers who inject them into downloads.


Source: User tip from @Kurt Lang


What is malware? - Apple Community




23 replies

Nov 5, 2025 12:57 AM in response to peterfrombridlington

iMac running macOS Sequoia 15.7.1 experiencing slow performance and beach balling.

Here is the copy of the EtrCheckPro report

My problem was simply that my Mac was constantly Beacballing and generally working very slowly.

Recently I have been trying to recover lost photo-files from a USB external storage which have ceased to work using a program called Disk Drill. I found Disk Drill very complicated to use and the YouTube instruction on how to use it so slick and complicated that I could not really understand it. It seems that my problems began from this point of using Drill Disk, maybe incorrectly. I hope this explanation is useful and that any advice given (hopefully in simple easy to follow terms) will improve my situation. Thank you for your help.


Nov 5, 2025 8:49 AM in response to Owl-53

Owl-53 wrote:

Thoughts on DriveDx ??

Have not used it myself so could not suggest it

Not really, I only dabbled with the free version a long time ago and as I recall the free version was only able to check the internal drive.


Plus having never used the WD drive management software.. I'm not exactly sure how one would uninstall the WD software and then have access to the data on the external drives. But I'm guessing that, the data on the external drive(s) would need to be copied to an unmanaged macOS formatted drive(s). Then uninstall the WD software and reformat the existing WD managed external drives.

Nov 7, 2025 3:19 AM in response to den.thed

Thank you to everyone who have replied and are helping me sort out the issues with my iMac.

I have printed all the responses and will slowly work through the suggestions that have been made. I must say I find some of the proposals a bit scary. For instance the "The Find any File" app has revealed approximately 1,300 files with 'WD' in their titles! I am just going to look at the ones that obviously refer to Western Digital, but I shall go carefully. Next I will follow other suggestions about using Disk Utility to format the external drives one at a time. I'll try and finish by Christmas. A sincere thank you for all your help.

Nov 7, 2025 7:42 AM in response to peterfrombridlington

peterfrombridlington wrote:

Thank you to everyone who have replied and are helping me sort out the issues with my iMac.

You're welcome.

I am just going to look at the ones that obviously refer to Western Digital, but I shall go carefully. Next I will follow other suggestions about using Disk Utility to format the external drives one at a time. I'll try and finish by Christmas. A sincere thank you for all your help.

Yes proceed very carefully, because formatting will wipe everything from the external drive(s). Be sure that you copy everything to another external drive and check it, before reformatting source drive.

iMac running macOS Sequoia 15.7.1 experiencing slow performance and beach balling

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