My Arduino IDE is missing many other built-in boards. So I cannot be able to upload code to the board I want. Can someone help? Refer to the picture attached for the problem description.
System: MacOS High Sierra
Arduino IDE: 1.8.10
This is very much not the normal behavior. I notice that you have installed Sanguino. Did you make any other customizations of the IDE?
Yes, I installed the Sanguino, so I can flash a bootloader to my Ender 3 3D Printer. I also installed ESP libraries, but I uninstall them so I can try to fix this issue. Do you think that the Sanguino is causing the issue? If so, how can I uninstall it?
I have tried to uninstall and reinstall arduino ide on my mac several times with different ide versions, but still no changes to the behavior. How can I delete everything completely from ide, so I can install a fresh and new version?
There are several other folders on your computer that affect your IDE configuration, so that even after you reinstall the IDE, modifications can persist:
Sketchbook folder: The location of the sketchbook folder is displayed in the Arduino IDE at File > Preferences > Sketchbook Location.
Data folder: /Users/{username}/Library/Arduino15