@Jezfuji Find the lines that look like this:
card 0x5916 "Intel (R) HD 620" $cardLevelMedium $resolutionMedium
card 0x5926 "Intel (R) HD 640" $cardLevelMedium $resolutionMedium
card 0x2982 "IntelÆ Graphics Media Accelerator X3500" $cardLevelLow $resolutionLow unsupported
Put your cursor at the end of the line that contains the HD 640 entry, and hit the return key, so you have this:
card 0x5916 "Intel (R) HD 620" $cardLevelMedium $resolutionMedium
card 0x5926 "Intel (R) HD 640" $cardLevelMedium $resolutionMedium
card 0x2982 "IntelÆ Graphics Media Accelerator X3500" $cardLevelLow $resolutionLow unsupported
Highlight the text in this box:
card 0x3EA6 "Intel (R) HD 645" $cardLevelMedium $resolutionMedium
Hit command-C to Copy, then put your cursor on the blank line shown above and command-V to Paste. The lines should now look like this:
card 0x5916 "Intel (R) HD 620" $cardLevelMedium $resolutionMedium
card 0x5926 "Intel (R) HD 640" $cardLevelMedium $resolutionMedium
card 0x3EA6 "Intel (R) HD 645" $cardLevelMedium $resolutionMedium
card 0x2982 "IntelÆ Graphics Media Accelerator X3500" $cardLevelLow $resolutionLow unsupported
Command-S to Save, then command-Q to Quit, then launch your game and check whether the edits worked. Instructions for checking are in my first post to you.