What does "UnityEditor.ProjectBrowser:DeletedSelectedAssets(Boolean)" mean?

So I don't know if you can tell but I am on a mac and just a little more insight to what I am doing. I am using my SSD to run unity. So I downloaded unity and put it on my SSD and got no errors. Then when I went to go delete my folder titled "Scene" it shows that error and then closes out unity. There is no problem right now as you can see I have barely started this game but I am just wondering is there a way to use unity on a portable drive on a mac? Has anyone else had these problems?