Any updates on this issue? I am having the same problem, but I can't find a solution. I am on a 64-bit mac. I have found that the v2.16.1 macintel version of fitparams (x_photcal.e) returns a segmentation fault so I tried the 32bit version. The macosx (x_photcal.e) version does appear to work except for the cursor commands. In particular, the delete/undelete always goes to the left-most point and the window resize "e" does not work right.
I tried using the macosx (v2.16 32bit) x_photcal.e version ftp://iraf.noao.edu/iraf/v216/support/macosx/x_photcal.e and it appears to have the same cursor problem, but otherwise works. The 2.16 macintel version kind of works, but only if the transformation equation equations defined in the params file don't include any numbers. That is:
UFIT : mU = (UB + BV + V) + u1 + u2 * (0.5*(XU+X
-1.5) + u3 * UB + u4 * UB * (0.5*(XU+X
-1.5) always returns u2 and u4 as
zero when fitting, however,
UFIT : mU = (UB + BV + V) + u1 + u2 * (XU) + u3 * UB + u4 * UB * (XU) works just fine.
Summary of fitparams (x_photcal.e) on my particular Mac 64-bit...
v2.16.1 macintel segmentation fault
v2.16.1 macosx math works, cursor does not (delete/undelete/resize)
v2.16 macintel math does not work correctly for some equations, but the cursor works like it should
v2.16 macosx math works, cursor does not (delete/undelete/resize)