Since there’s no forum (as far as I know) for Mac OS X users, I decided to ask the question here. I have almost no experience with Unity 3D, because I have never had much time to explore it.
Now, I would like to continue my adventure, but my version is still 4th version (4.6.0f3), and I would like to update it to Unity 3D 5.
Now, my question is: is there an easy way to upgrade it without having to uninstall (basically trashing it) this version and install the new one? What is the standard way to upgrade (and eventually uninstall) Unity 3D on a Mac?
But I have already Unity 4 installed, did you understand that? What happens if I install unity 5? Will I have both installed on my mac? Of course I don’t want that, I would like just to upgrade to Unity 5.
It will just install over top of the existing install. But I don’t recommend that; rename your current Unity folder first, so you have both, just in case.
As I said, it will install on top. The only thing trashing the existing version will do is waste time. But I recommend that you do not install on top—rename your Unity 4 folder, so you have both, just in case.
So, as @Eric5h5 says, install the new version alongside the old one. The Unity installer on a Mac will always install to:
/Applications/Unity
What you do is rename that Unity folder to /Applications/Unity460f3. Once you have done that, install the next version. You’ll have a new /Applications/Unity folder so rename that to /Applications/Unity501p1 or whatever version you’ve downloaded. You now have two Unity versions on your machine. Before launching the 5.0.1 version, save your existing project, just in case you ever need to go back to 460.
And, as you say, you might end up with 80 installs. But that’s not a problem. If you have Unity versions you haven’t used in 32 years, then just delete them by dragging the unused ones to the trash. (I currently have 16 versions installed on my machine.)