hi,
can you please explain the complete os ,macintosh

Mac OS is a series of graphical user interface-based operating systems developed by Apple Inc.Leopard is the latest OS which I fell is world's most advanced OS ( I work on Vista and Leopard and I like Leopard most)

Wiki Mac OS - Wikipedia, the free encyclopedia will give more details

If there is question about specific OS feature or abt tiger/leopard just mail back

im using xp and linux i wd like to hv mac .........can mac support .exe files like xp

Hello

MAc cannot be installed on machine which has WIN XP. Apple provides MAC only on its Hardware i.e MAC cannot be installed on DELL H/W. Only Apple H/W works.
No MAC does not support exe files . However there are executables in other forms. exe is a WINDOWS only format. .command is Unix executable. MAC has DMG's which help a lot in installation