The bug
When you held ctrl on a mac and clicked it used to right click on other Minecraft versions but something inside the 1.13 snapshots removed this.
Linked issues
is duplicated by 8
relates to 1
Comments 19
https://bugs.mojang.com/browse/MC-13695
It's a problem in LWJGL 3, I assume. Game is unplayable on Mac laptops without a fix for this.
Yes, that issue is already linked to this report.
As a workaround, you should be able to set your "use" key to something else than right click (for example, Enter) in the control settings.
Somehow this has been fixed in 1.13-pre10 but it was not included in the release notes or updated on this ticket (It could have been a coincidence or on purpose)
Note that this is best demonstrated by using a Mac laptop trackpad. Ctrl-Click on a trackpad should send a right-click.