Computer is running very slow
A slow computer is one of the most common problems, and a few simple tidy-ups usually make a real difference.
What to do
Step 1: Restart the Mac: open the Apple menu and choose Restart.
Step 2: Quit apps you aren't using: right-click the app in the Dock and choose Quit.
Step 3: Close browser tabs you don't need.
Step 4: Open the Apple menu, choose System Settings, then General, then Software Update, and install any updates.
Step 5: Check free space in General, then Storage. Delete or move files you don't need and empty the Trash.
Step 6: Open Login Items in General (it may be called Login Items & Extensions) and remove apps you don't need at startup.
Still stuck? If it's still slow, it may be getting old or need more memory or a faster drive, so ask a trusted repair shop for advice before buying anything.