The shortcut to add a row to a matrix ("ctrl"+"Return") on my OS X version 188.8.131.52, isn't working. Instead of inserting a new row it just inserts a new line into the cell. Has anyone else experienced this, and does anyone have a solution? I have looked through the "KeyEventTranslations.tr" file and everything is in order.
I've had the same issue. For some time I just ignored it because I've assumed that perhaps I've somehow broke it myself by writing custom stylesheets and packages or downloading something. Today though I got annoyed enough to dig deeper and I've verified it wasn't due to any autoloading package or stylesheet. It also didn't appear to be a conflict as I checked the
KeyEventTranslations.tr file (at least the user copy copy of it from
$UserBaseDirectory, so I decided to switch the shortcut to
CTRL+M and all the sudden I have now two working key shortcuts!
I'm not sure, but I think it points towards a conflict of redefinition of a sort.
Mathematica 11.3 on a mac running OS X 10.14.1
I also had this problem and found that removing an add-on, mathStatica, fixed the problem (after a couple of restarts of Mathamatica). However, I suspect that this could be a bug in Mathematica, since clearing the
FrontEnd entry in mathStatica's
PacletInfo.m also fixed the problem, suggesting a startup issue.