[Combat Mission Cold War v1.07 patch is available for download]

Installation MacOS 13.5.2 completed and while the game appears to run fine so far, in the editor the unit labels appear to have been corrupted.

 

[Can't get M106 to fire more than one round.]

Looks like in this instance, it is being affected by the minimum range of the mortar being measured from the observer. Targeting beyond this minimum from the observer gives the expected mortar drop effect.