# Troubleshooting
## Table of Contents
- [Linux](#linux)
- [Fonts showing up as rectangles](#linux-fonts-rectangle)
- [Global menu workaround for KDE](#linux-kde-global-menu)
- [Flatpak most common issues](#linux-flatpak-most-common-issues)
- [macOS](#macos)
- [App can't be opened because Apple cannot check it for malicious software](#macos-unidentified-developer)
- ["VSCodium.app" is damaged and can’t be opened. You should move it to the Bin](#macos-quarantine)
## Linux
#### *Fonts showing up as rectangles*
The following command should help:
```
rm -rf ~/.cache/fontconfig
rm -rf ~/snap/codium/common/.cache
fc-cache -r
```
#### *Global menu workaround for KDE*
Install these packages on Fedora:
* libdbusmenu-devel
* dbus-glib-devel
* libdbusmenu
On Ubuntu this package is called `libdbusmenu-glib4`.
Credits: [Gerson](https://gitlab.com/paulcarroty/vscodium-deb-rpm-repo/-/issues/91)
#### *Flatpak most common issues*
- blurry screen with HiDPI on wayland run:
```bash
flatpak override --user --nosocket=wayland com.vscodium.codium
```
- To execute commands on the host system, run inside the sandbox
```bash
flatpak-spawn --host
# or
host-spawn
```
- Where is my X extension? AKA modify product.json
TL;DR: use https://open-vsx.org/extension/zokugun/vsix-manager
- SDKs
see [this](https://github.com/flathub/com.vscodium.codium?tab=readme-ov-file#sdks)
- If you have any other problems with the flatpak package try to look on the [FAQ](https://github.com/flathub/com.vscodium.codium?tab=readme-ov-file#faq) maybe the solution is already there or open an [issue](https://github.com/flathub/com.vscodium.codium/issues).
## macOS
Since the App is signed with a 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
```