Hello World on NASM that runs on a Mac

hello_world.asm

; Basic Hello World that compiles on MacOS
; nasm -fmacho64 test.asm && cc test.o -Wl,-no_pie && ./a.out 
 
global _main
extern _puts, _exit

section .text

_main:
    ; Saves the stack, not really useful here but will ensure the stack is 16 bits-aligned
    ; BEWARE: the mac is super strict on pointer alignment, misaligned stack segfaults on    
    ;         function calls !!!
    push rbp          
                      
    mov rdi, qword hw ; First argument is a pointer to the message          
                      ; (added "qword" qualifer so it compiles on yasm too)
    call _puts                                                              
                                                                            
    ; cleanup                                                               
    pop rbp
    ret

section .data

    hw db "Hello from NASM", 0