BT and Norton
Hi, I use BT for broadband and also a name@bt.com email address. Bt have issued a letter saying they are updating their online security to Norton, replacing McAfee. I found McAfee slowed the computer terribly so I uninstalled it. Apple advised that their built-in security is so good that an extra software package is not necessary , but if I really wanted to add some software security then they recommended Malwarebytes, which I installed a few years ago and which doesn't seem to slow the machine at all. Should I now try and add Norton or just ignore BT's letter and carry on with Malwarebytes. I am running an iMac and MacBookPro both on the latest Mojave issue. Thanks in advance for your advice.
iMac 21.5″, macOS 12.1