[quote='796643022, DTS Engineer, /thread/760125?answerId=796643022#796643022'] I wanna take a step back and ask about your overall goal. You mentioned Transporter, which suggests that you want to ship your app on the Mac App Store. Is that correct? [/quote] Exactly. Thank you for the web links.

OK. Fom the web page link I will try "Fix an app built with Xcode" first and if it doesn't work I will try "Fix an app built outside of Xcode". Thanks a lot for the link.

Sorry, the picture does not appear in the post !

My apology: forget the last reply. Using the Remove button and re-enter the bundle name\ID solve the problem.

Those are the same thing. So I assume that Bundle ID in "Certificates, Identifiers & Profiles" must be copied in Xcode "Target" "Signing & Capabilities" ? I do a mistake in the Bundle ID in "Certificates, Identifiers & Profiles" (developer web site). How can I change this Bundle ID ?

Solution: insert .s assembly code between .if TARGET_CPU_ARM64 and #if TARGET_CPU_X86_64 test_cpu.c #include <stdio.h> #include "TargetConditionals.h" #include "test_cpu.h" extern int64_t add_test_asm(int64_t, int64_t); char buf[128]; int64_t a, b, sum; void test() { #if TARGET_CPU_ARM64 a = 4; b = 70; sum = add_test_asm(a, b); snprintf(buf, 128, "CPU is ARM64, %llu + %llu = %llu", a, b, sum); #elif TARGET_CPU_X86_64 a = 40; b = 7; sum = add_test_asm(a, b); snprintf(buf, 128, "CPU is X86_64, %llu + %llu = %llu", a, b, sum); #endif } test_cpu.h extern char buf[]; extern void test(void); add_arm.s file #include "TargetConditionals.h" .if TARGET_CPU_ARM64 .globl _add_test_asm .align 4 _add_test_asm: add x0,x0,x1 ret .endif add_intel.s file #include "TargetConditionals.h" #if TARGET_CPU_X86_64 .globl _add_test_asm .align 4 _add_test_asm: movq %rdi,%rax addq %rsi,%rax retq #endif

Partial solution: let d_tst the directory holding main.c, arm.s, intel.s and source_c a folder of other C files cd d_tst gcc main.c intel.s ./source_c/.c -o x86_app -target x86_64-apple-macos10.12 gcc main.c arm.s ./source_c/.c -o arm_app -target arm64-apple-macos11 lipo -create -output universal_app x86_app arm_app But this work only for command tool with terminal. How to make a universal application with Xcode project and gui (and intel.s, arm.s)? Or to link in a such project ?

Or equivalent of "C" #if TARGET_CPU_ARM64 #elif TARGET_CPU_X86_64 #endif directive in assembler

How to tell Xcode a f1.s file is for Intel assembler and f2.s file is for Arm assembler ?