This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
You can do it 'by hand' using a block editor to change filetype, etc. information in a directory block; or, you can use UnforkIt. UnforkIt is a BASIC program by Ivan Drucker which splits a forked file into two files, neither of which is forked. ___________________________ Size Note: Transferring to 3.5" disk Although 2MG, Diskcopy, and some other 800k image formats have file sizes greater than 800k, on a ProDOS diskette they will often occupy a good deal less space. You will often be able to transfer such files (e.g. via a NULL modem connection) to an Apple II 800k diskette so long as you employ a protocol which does not pre-send size information, such as X-modem.