Comment 3 for bug 1914849

The patch can be used as a workaround for now:
diff --git a/util/osdep.c b/util/osdep.c
index 66d01b9160..76be8c295b 100644
--- a/util/osdep.c
+++ b/util/osdep.c
@@ -110,6 +110,9 @@ int qemu_mprotect_none(void *addr, size_t size)
 {
 #ifdef _WIN32
     return qemu_mprotect__osdep(addr, size, PAGE_NOACCESS);
+#elif defined(__APPLE__) && defined(__arm64__)
+ /* Workaround mprotect (RWX->NONE) issue on Big Sur 11.2 */
+ return 0;
 #else
     return qemu_mprotect__osdep(addr, size, PROT_NONE);
 #endif