HD 3000 Graphical Glitches in 10.12.6 + other performance issues

I installed Mac OS 10.12.6 on my laptop and then used the Migration Assistant to transfer my data from a previous partition. Ever since, it has been slow and unusable. My HD 3000 graphics chip has been having artifacts, lines, and weird black or white cutouts with little dots in them in some area on the screen, and every slightly graphics intensive program crashes whenever I try to do something. Photoshop crashes whenever I try to save a photo, FCP crashes shortly after opening, and iMovie does the same.

submitted by /u/MrDarkwraith
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