...BlitzMax1.16

o What if i want to redownload these versions again, any link?
o Does syncmod still work then?
o Was 1.16 also available for OSX intel?

I think you're out of luck... any special reason as to why you would want that though?

a) archiving and b) i just want to hit the build&run button...

1.26 has a build and run button.

Yes, but in some cases i would prefer just hitting the button instead of altering the sources so that it compiles for 1.26.

try emailing Mark, maybe he's got an old version on his harddrive (assuming he's using some sort of CVS)..