Hey guys,
I'm trying to decide what devices I want to buy next. This is a really serious problem for me as all of my current devices are very old and are beginning to break down.
I'm considering buying all Apple products like: Apple Mac Mini, Apple iPhone and an Apple iPad. However, I'm worried about keeping my devices secure as I'd be extremely vulnerable to attacks if someone released malicious software/virus that targets Apple devices... 
Am I more secure if I have a mixture of devices from different manufacturers like say: Android Phone/Windows PC/Apple iPad Tablet?
Thank you for any advice!
All devices and brands today offer adequate security for the majority of users as long as the user keeps the devices with up-to-date security patches. Apple devices work in synergy and with Apple's more authoritarian approach with the app store and privacy issues mainly geared to protect their users in expense of disdain from some developers, namely Google who spy on people with their apps, help reduce the experience of malware and virus infection. No devices offer 100% protection and it depends on what you are doing also. If someone tries to mess with the NSA, even owning all Apple devices will result in you being hacked by the NSA regardless of how well security you had placed in. Of course, that's the extreme end, but I had met people who work to expose corrupt governments, criminal activities and even they, with advance security and devices set up by IT security firms personally got hacked with threats of harm and death. Again, that's the extreme end.
However, what you had just said may probably be an explanation of your issues. You have current devices that are very old and beginning to break down. To me, this suggest that your devices may no longer receive current security updates and that would lead to security issues.
Apple security approach is pretty reasonable for each machine. Roughly 5 years of support for iPhone and iPad and roughly 3 years for each version of Mac OSX for security updates. Windows PC and Android have similar lifespan.
So if you want to continue having security updates, you need to continue updating your devices every 5 years or so to maintain good security. In terms of better security, iPhone is better than Android, but Android is more open whereas the iPhone is more of a closed system.
Last but not least is how do you interact with the internet? If you go to websites that are likely to infect you with malware, then no amount of security will catch all of that malware and viruses, because what the hackers rely on is human error. Current systems are very good and secure if the human who operates it understands that certain places on the internet are not safe. Education and then having updated security on devices will reduce infection and hacking to a minimal. You will never get 100% security, but as long as you are educated and practice safe browsing, your chances being hacked are pretty low.
I personally own all kinds of devices protected by a security router that monitors my devices and web sites for malware and infections and rarely get any warning hits. But when I have friends over and they use my WIFI, my security router goes bonkers reporting malware and malicious sites access. Of course telling them make no difference. They were after those freebies; and nothing on the internet is a free lunch and they are addicted to those social media sites which can then infect their phones. Phones actually are now more susceptible to malware and infection than a computer is because of the social media content they access and download and a possibility of SIM SWAP.
