Troubleshooting

Linux

Fonts showing up as rectangles

The following command should help:

rm -rf ~/.cache/fontconfig 
rm -rf ~/snap/codium/common/.cache
fc-cache -r

How do I fix rendering glitches such as text and/or the entire interface not appearing?

You have likely encountered a bug in Chromium and Electron when compiling Mesa shaders, which has affected all VSCode and VSCodium versions for Linux distributions since 1.82. The current workaround is to delete the GPU cache as follows:

rm -rf ~/.config/VSCodium/GPUCache

or for flatpak:

rm -rf ~/.var/app/com.vscodium.codium/config/VSCodium/GPUCache

macOS

Since the App is signed with self-signed certificate, on the first launch, you might see the following messages:

App can't be opened because Apple cannot check it for malicious software

You can right-click the App and choose Open.

"VSCodium.app" is damaged and can’t be opened. You should move it to the Bin.

The following command will remove the quarantine attribute.

xattr -r -d com.apple.quarantine /Applications/VSCodium.app