I think what Dan is getting at is, if virus writers know a good deal of Mac users are using the same antivirus software, it gives them a more unified target because all they have to do is find an exploit for that software and, voila, they can infect numerous Macs. Certainly, in an article claiming people are spreading fear of OS X vulnerability, accusations like these shouldn't just be thrown out there. However, this is a very serious accusation that really needs to be backed up by proof. Hope this helps.Are you actually suggesting that installing Mac antivirus software makes users more vulnerable to attack? I can see how that could theoretically be possible if the antivirus software was poorly written security-wise. The 13' laptops we have now are only 3 lbs, run the latest Mac OS and are fast, even in the base touch bar model.

As others will tell you, however, 'your mileage may vary.' If you can afford it, I would recommend an upgrade to one of the new 2017 MacBook Pros. As we spend most of the time online, it is important to maintain the latest standards and security updates. Generally, we replace a computer when it will no longer update to the latest Mac operating system.

Our original 1984, 128K Macintosh, luggable computer also traveled the world until 1993, when the ROM BIOS chip failed. Also given away at the end of 2016, still in working order. Also replaced the battery in 2013, upgraded the HDD to SSD and doubled the RAM. We also had a 13', mid-2009, MacBook Pro. Very reliable laptop, but also well cared for.

It had traveled with me around the world and across the USA. Gave it away, in full working order at the end of 2016. I did replace the HDD with a solid state drive (SSD) and added memory in 2013. I had a 2008 MacBook Pro, 15' screen, that ran until I replaced it, in late 2016, with a 2016 MacBook Pro, with Touch bar.

Avg for macbook pro os