Unity constantly freezing

So, I've had Unity on this computer before with no issues, regardless of quality settings unity worked smooth and never froze up. However, yesterday I reinstalled Unity after having the urge to use it and ran into an issue. It freezes when doing the simplest tasks. Creating a game object like a cube or sphere froze for approximately 10 seconds and then attempting to resize it froze it completely. I've reinstalled again and that seems to have fixed the game object issue, but even on the LOWEST quality setting it still freezes up a bit when doing something as simple as opening MonoDevelop. And like I said, I've used it on this computer before with no issues (I think Unity 5.1, so only a couple months ago). I've checked to see if it's maxing out my CPU or any other components and it isn't. The editor windows like hierarchy and what not also have this weird graphical glitch where they flicker between two windows Running on a Mac