It won't let me install the new software for some reason if anyone can please help me i am at my witts end so stressed out all i want to do is play my world of warcraft and when i try to downloand the software update it says "This version of macOS 10.13.3 cannot be installed on this computer. it makes No sense what so ever i even tried downloading from the website still says same thing. Please if anyone can help me get it installed ill be oh so ever thankful !!! Here are some photos with some information.