Here’s how to see how much memory is in your Mac if you’re using macOS® Sierra: You may just not have enough storage for the apps and programs you use. Restarting your computer after you’ve saved information gives the RAM a fresh start when the system boots up again, and gets rid of any lingering unused apps or processes running in the background that aren’t necessary. It’s usually ready when you are, and that’s one of the greatest appeals of using any Apple product. There’s a better, more reliable way to reinvigorate your Mac system that will last – adding more RAM and an SSD.It’s easy to leave your Mac system on without shutting it down. It’s wishful thinking that a simple download will fix everything on your computer – don’t fall for a software program whose benefits don’t last and will only leave you more frustrated. Upgrading your hardware addresses the root cause of a slowdown, which is fundamentally different from software solutions offered by third-party downloads that promise to easily fix your system. There are easier ways to solve this problem than spending a lot of money buying a new computer.
Identifying corrupt files or programs is important, however, slow performance usually has a far less sinister origin.
If your Mac is running slow, software and programs you've added might be to blame, causing problems behind the scenes.