The xclock package contains a simple clock application
which is used in the default xinit configuration. This package
is not a part of the Xorg katamari and is provided only
as a dependency to other packages or for testing
the completed Xorg installation.
Enable snaps on elementary OS and install xclock-simosx
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
Enable snapd
Snap can be installed on elementary OS from the command line. Open Terminal from the Applications launcher and type the following:
sudo apt update
sudo apt install snapd
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.
Install xclock-simosx
To install xclock-simosx, simply use the following command: