Unrecognized Video Card

@Jezfuji  You'll need to add your card's info to the file called graphicscards.sgr, inside the package contents for Sims 4.  If the Sims 4 is not in the regular Applications folder, Origin likely installed it into your user account.  To find it, open a Finder window, click Macintosh HD (or whatever you've named your hard disk) in the left panel, then Users\[your username]\Applications.  (If you don't see the hard disk listed, click Finder in the upper left corner of your screen, then Preferences, then Sidebar; then under devices, check the box next to Hard Disks.)

Once you've found the Sims 4 install location, right-click, or hold down crtl and click, on the TS4 icon and select Show Package Contents.  Open Contents, then graphicscards.sgr.  It should open automatically in TextEdit, but if not, you can right-click, select Open With and then choose TextEdit.

In graphicscards.sgr, hit cmd-F and search for HD 620.  That will take you to these lines:

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

Under the second line above (for the HD 640), create a new line and copy and paste the following:

card 0x3EA6 "Intel (R) HD 645" $cardLevelMedium $resolutionMedium

Save the file and quit, launch TS4 and quit, and open the file called config.log inside your Sims 4 game folder (in Documents\Electronic Arts).  About 30 lines down, you'll see the graphics card info.  If your card's name has a [Found: 1, Supported: 1] entry, then the edit worked.