In article ,
roy678 wrote:

I was recently recovered a Macintosh Excell version 1.0 file that I would
like to use in Excell 2003.

I don't know any way other than to use an old version of XL (and I no
longer have a machine that will run XL2 or XL3, if I could find them).
The XL1 format was obsolete before XL was ported to Windows 18 years
ago, so I don't know if even WinXL2 could read it.