Some Mac workstations that are running with ultra-HD or 4K resolutions may display small text sizes when launching Citrix Workspace. One adjustment users can make in the Citrix control panel to get the fonts appearing normal:
Look for the minimized Citrix Workspace icon running in the upper-left near the system clock.
Right-click on the Citrix icon, and then click the Preferences button
Check the box to Enable and match client DPI scale settings. Save and restart the system.
If the Citrix option is not appearing under the Preferences > general tab, the system may be running an older version of Citrix Workspace, and should install from the link below:
https://www.citrix.com/downloads/workspace-app/mac/workspace-app-for-mac-latest.html