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Norton Internet Security Slows Performance of Mac

Since I installed Norton Security on my Mac the performance has been very slow, so slow I was thinking about upgrading.  Significantly slower to book and open web pages, download e-mail. I have just uninstalled Norton Security and now the system is running at the original speed, quick and responsive. It's not a super powerful system but has always been fine for our needs, web browsing, e-mail and a bit of final cut pro and motion graphics. However, I am now running without any virus security on my system. System details are below, 

 Model Name:    iMac

  Model Identifier:    iMac12,1

  Processor Name:    Intel Core i5

  Processor Speed:    2.5 GHz

  Number of Processors:    1

  Total Number of Cores:    4

  L2 Cache (per Core):    256 KB

  L3 Cache:    6 MB

  Memory:    12 GB 

System Version:    macOS 10.13.2 (17C88)

  Kernel Version:    Darwin 17.3.0

I have been running Norton security on my PC for many years without a problem but is a shame the Mac software is not as well developed. Please, can you let me know when you have an update the Norton Security software to address the poor performance? So I can re-install the product. 

Labels: Performance



Re: Norton Internet Security Slows Performance of Mac


I have also just run back magic disk test on my external SSD drive. Without Norton Internet Security I get a quite respectable 286 MB/sec with Norton Internet Security I get 95 MB/sec. Shocking.  


Re: Norton Internet Security Slows Performance of Mac

Hello pnaybour What product and version of Norton are you using? Here is the compatibility list by OS for MAC: https://support.norton.com/sp/en/us/home/current/solutions/kb20080515115252EN_EndUserProfile_en_us

If you find that your product is compatible I suggest removal and reinstall your product. Here is how: https://support.norton.com/sp/en/us/home/current/solutions/kb20080427024142EN_EndUserProfile_en_us

Please let us know how this worked out for you.


"From DOS to Windows10 what a journey it has been" / MS Certified Professional / Windows 10 Home / Professional x 64 version 1903 / build 18362.175 / N360 Deluxe / Norton Core v.282 on Android 2.00

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