Q: how do i speed up my mac

Hi ...

Start here > Mac troubleshooting: What to do when your computer is too slow | Macworld

Avoid installing third party cleaning utilities. They do more harm than good.

Your Mac runs maintenance for you >  Mac OS X: About background maintenance tasks

Which OS X is installed on your Mac ?

Click the Apple () menu top left in your screen. From the drop down menu click About This Mac. The version is noted there.

Troubleshooting advice can depend on that information.