Probably the single biggest upgrade you can do to an older Mac is fit a Solid State Drive (SSD), which for around £100 can have a dramatic impact on the performance of your system.

Upgrading your CPU can be a frustrating experience, even though the physical acts of removing an old processor and installing the new one are pretty easy. The more difficult questions to answer ...

This is often known as a CPU bottleneck, and it’s exactly where a CPU upgrade can help. That being said, it’s not always worth upgrading if your GPU usage isn’t perfect.