Linux
Install
Install Flatpak:
📈
flatpak install flathub io.github.brunoherbelin.Vimix
If you want to get the vimix Beta version try to create your own Beta flatpak !
Install Snap:

snap install vimix
Install the Debian Ubuntu package:
sudo apt install vimix
NB: the Debian package is stable but not up to date with latest developments.
Install from Ubuntu Software app
Search for 'vimix' in the software explorer and choose the origin, Snap (left) or Flatpak (right).
Set App permissions
Following recommended security policies, default permissions of vimix do not allow access to your home folder.
Run these commands to provide access to your home directory;
snap connect vimix:home
flatpak override --user --filesystem=home io.github.brunoherbelin.Vimix
For snap or deb packages, permissions can also be set in the system Settings (left). For Flatpak, you can install Flatseal to adjust permissions (right):
Please not that the sandboxing mechanism of the snap package prevents vimix from accessing shared memory and capturing screenshots of apps that are not also installed from a snap packages.
Mac OSX
Download
Download latest package from Github Releases page.
Install
Open the DMG package, agree to the license and drop the vimix app to your Applications folder
Set permissions
(Allow to accept)