So there is this bug present that makes the crosshair in v0.9 disappear for some Mac users, this will help you copy over the old crosshair mesh from v0.8 to v0.9 to fix the issue.

(You will need a text editor or something similar for this to work)

Go into the 'meshes' file in the mod folder on 0.9

Find "mesh_crosshair 0 sw_reticle"(CTRL (or Command) + F to search in the document, type in 'mesh_crosshair')

You should get the following result:
mesh_crosshair 0 sw_reticle 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.150000 0.050000 0.050000

Now replace that with the line of text from the identically named 0.8 file which looks like this:
mesh_crosshair 0 sw_reticle 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.300000 0.200000 0.200000

Remember to ONLY replace that specific string of text, or else you will be messing up some other stuff. The guy i got this guide from had to reinstall v0.9 because he deleted something else, so be carefull.

That should fix the issue, go ahead and post a comment if it did not work and i'll see what i can do about resolving it.