To improve your Mac’s speed, start by closing unnecessary apps and browser tabs that consume memory. Clean up your hard drive by removing unused files, old downloads, and large media files to free up space. Make sure your macOS and all apps are updated to benefit from the latest performance enhancements. Disable unneeded startup items from System Settings to reduce boot time. You can also consider upgrading your RAM or switching to a solid-state drive (SSD) if your Mac supports it, for a significant performance boost.