After performing a fresh install of Loki 0.4.1 on my White Macbook 2010, which worked perfectly, I proceeded to update the system from within the App Center itself. When I rebooted, after entering my disk password (it's encrypted), I got stuck on a black screen with the mouse pointer. I can move it and press enter (which sometimes hides the cursor, but ends up showing it again). I can also open a tty (but it closes itself from time to time to show again the black screen with the pointer, almost like if I were stuck on a loop).

I have tried several things after this:

• Download and install elementaryOS 5.0 Beta 2. Black Screen.
• Download and install elementary0S 0.4.1 Works fine.
• Upgrade a fresh 0.4.1 install. Stops working and black screen appears again.

I have no idea of what to do now, so I would really appreciate if someone could walk me through.