Ikon getting erased and 2/3 screen usage.

Not sure if this has been covered in some item. I tend to get lost on these types of sites. I’m a knuckle-dragger and tend to point and click….if it doesn’t work, I don’t tend to use it any more and have a fit of ‘Magic box not working bubba go back to cave drawings.’ Needless to say I’m having trouble with getting the Kodi ikon/tile to stay on my desktop screen whenever I need to shut my computer off, or I have to reconstruct the whole thing again from my ‘launchpad’ tile on my MAC. I’ve tried to search through all the MAC info along with the Kodi info but I’m missing something. Along with that my cursor only goes two thirds of the way across the screen then hits an invisible wall. I can go up and down but NEVER past the 2/3’s invisible stop, obviously yet another step or info I’m missing. I hope someone here can help me as my head is bruised in a number of spots from banging it with my computer or the wall.