I want to execute a program (which I know was written in C++), but I get this error:

zsh: exec format error: ./myProgram

Output of file myProgram:

myProgram: Mach-O i386 executable

My system is a 64-bit Linux. I also tried on a 32-bit Ubuntu VM, but I get:

bash: ./myProgram: cannot execute binary file: Exec format error

Why wasn't I able execute that program? How can I execute it?