Hi David,That's weird because if the AioPlugin is not present in my VM, PipeableOSProcess shouldn't have worked till this morning... when I upgraded my mac :-) The warning is not skippable, it stops me at: MessageNotUnderstood: IRJump>> #nextBytecodeOffsetAfterJumpCheersDavide On Friday, February 4, 2022, 03:54:59 PM GMT+1, David T. Lewis <lewis@mail.msen.com> wrote: On Fri, Feb 04, 2022 at 01:46:46PM +0000, Davide Varvello via Pharo-users wrote:

Hi guys, Suddenly evaluating a simple: (PipeableOSProcess command: 'ps') output, or any other PipeableOSProcess command, Pharo gives me: "aio event forwarding not supported". I guess it is something related to the latest update of the OS, specifically Big Sur 11.6.3 (20G415) https://support.apple.com/en-us/HT213055I'm on a Mac, of course, Pharo 8.0.0, Build information: Pharo-8.0.0+build.1128.sha.9f6475d88dda7d83acdeeda794df35d304cf620d (64 Bit) Can you help me, please?CheersDavide

Hi Davide, The warning message indicates that the AioPlugin is not present in your VM. I do not know the reason for that, although your PipeableOSProcess should still work if you proceed through the warning. Dave