More powe r!
El Capitan will give Macs a major performance boost. Sadly, there’s no third‑party app you can install to make your Mac significantly faster, but there are
things you can do to squeeze more power out of an older machine. Where possible, replace an internal hard drive with an SSD, and install more memory. Additionally, cut down on cruft, such as
background apps and login items, the latter of which can be managed in Users & Groups > Login Items within