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I use UTM.app for virtualisation. I have full virtualise "Fedora 38-aarch64" in UTM.app with rosetta enabled. After upgrading Sonoma to 14.3 it stop properly virtualised shared memory. I have this test file: #include <stdio.h> #include <sys/shm.h> #include <sys/stat.h> int main () { int segment_id; char* shared_memory; struct shmid_ds shmbuffer; int segment_size; const int shared_segment_size = 0x6400; /* Allocate a shared memory segment. */ segment_id = shmget (IPC_PRIVATE, shared_segment_size, IPC_CREAT | IPC_EXCL | S_IRUSR | S_IWUSR); /* Attach the shared memory segment. */ shared_memory = (char*) shmat (segment_id, 0, 0); printf ("shared memory attached at address %p\n", shared_memory); /* Determine the segment's size. */ shmctl (segment_id, IPC_STAT, &shmbuffer); segment_size = shmbuffer.shm_segsz; printf ("segment size: %d\n", segment_size); /* Write a string to the shared memory segment. */ sprintf (shared_memory, "Hello, world."); /* Detach the shared memory segment. */ shmdt (shared_memory); /* Reattach the shared memory segment, at a different address. */ shared_memory = (char*) shmat (segment_id, (void*) 0x5000000, 0); printf ("shared memory reattached at address %p\n", shared_memory); /* Print out the string from shared memory. */ printf ("%s\n", shared_memory); /* Detach the shared memory segment. */ shmdt (shared_memory); /* Deallocate the shared memory segment. */ shmctl (segment_id, IPC_RMID, 0); return 0; } Command to compile it is gcc -Wall a.c && ./a.out When I compile it in virtualised Fedora work properly show this: shared memory attached address segment size: shared memory reattached address Hello, world. When I compile directly on M1 mac id it die shared memory attached address segment size: shared memory reattached address Segmentation fault: I'm try it also in docker x86 in virtualised fedora and also show error In "Fedora 38-aarch64 virtualised" run x86 docker "docker run -it --platform linux/amd64 oraclelinux:7.9 bash" Install gcc in docker shell "yum install -y gcc" After compile and run it die with shared memory attached address segment size: shared memory reattached address Hello, world. assertion failed [rem_idx != ]: Unable find existing allocation shared memory segment to unmap (VMAllocationTracker.cpp remove_shared_mem) Trace/breakpoint (core dumped) How can I fix it? On previous version of Sonoma works properly. Thank you