pyocd won't load on M1 Mac

Question

I want to use pyocd-gdbserver on my M1 Mac mini, but it won't load.

I'm running Python 3.9 (arm64), and I get this long traceback (below) because some .dylib only has i386 and x86_64 architectures, and what's needed is arm64e (is that different from arm64?).

I don't know what .dylib it is, because pyocd makes an anonymised private copy. I've downloaded the arm64 version of Segger's JLink software, and libusb is also arm64.

I've been running the same board (BBC micro:bit v1.3B) on an Intel Mac, and pyocd worked fine without having installed Segger's JLink firmware on it; but just in case I installed Segger's firmware - no difference.

Here's the log ... (I've folded the lines at the end)

$ pyocd-gdbserver 
Traceback (most recent call last):
  File "/Users/simon/Library/Python/3.9/bin/pyocd-gdbserver", line 5, in <module>
    from pyocd.tools.gdb_server import main
  File "/Users/simon/Library/Python/3.9/lib/python/site-packages/pyocd/__init__.py", line 21, in <module>
    from . import gdbserver
  File "/Users/simon/Library/Python/3.9/lib/python/site-packages/pyocd/gdbserver/__init__.py", line 17, in <module>
    from .gdbserver import GDBServer
  File "/Users/simon/Library/Python/3.9/lib/python/site-packages/pyocd/gdbserver/gdbserver.py", line 49, in <module>
    from ..commands.commander import ToolExitException
  File "/Users/simon/Library/Python/3.9/lib/python/site-packages/pyocd/commands/commander.py", line 25, in <module>
    from ..core.helpers import ConnectHelper
  File "/Users/simon/Library/Python/3.9/lib/python/site-packages/pyocd/core/helpers.py", line 26, in <module>
    from ..probe.aggregator import DebugProbeAggregator
  File "/Users/simon/Library/Python/3.9/lib/python/site-packages/pyocd/probe/aggregator.py", line 83, in <module>
    load_plugin_classes_of_type('pyocd.probe', PROBE_CLASSES, DebugProbe)
  File "/Users/simon/Library/Python/3.9/lib/python/site-packages/pyocd/core/plugin.py", line 104, in load_plugin_classes_of_type
    if plugin.should_load():
  File "/Users/simon/Library/Python/3.9/lib/python/site-packages/pyocd/probe/jlink_probe.py", line 377, in should_load
    return JLinkProbe._get_jlink() is not None
  File "/Users/simon/Library/Python/3.9/lib/python/site-packages/pyocd/probe/jlink_probe.py", line 50, in _get_jlink
    return pylink.JLink(
  File "/Users/simon/Library/Python/3.9/lib/python/site-packages/pylink/jlink.py", line 292, in __init__
    lib = library.Library()
  File "/Users/simon/Library/Python/3.9/lib/python/site-packages/pylink/library.py", line 261, in __init__
    self.load_default()
  File "/Users/simon/Library/Python/3.9/lib/python/site-packages/pylink/library.py", line 299, in load_default
    return self.load(path)
  File "/Users/simon/Library/Python/3.9/lib/python/site-packages/pylink/library.py", line 353, in load
    self._lib = ctypes.cdll.LoadLibrary(tf.name)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/ctypes/__init__.py", line 452, in LoadLibrary
    return self._dlltype(name)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/ctypes/__init__.py", line 374, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: dlopen(/var/folders/ch/k_zwspdx3qsfbt1_x21zld6m0000gn/T/tmp5g6hpqrt.dylib, 0x0006): tried:
 '/var/folders/ch/k_zwspdx3qsfbt1_x21zld6m0000gn/T/tmp5g6hpqrt.dylib'
   (fat file, but missing compatible architecture (have (i386,x86_64), need (arm64e))),
 '/private/var/folders/ch/k_zwspdx3qsfbt1_x21zld6m0000gn/T/tmp5g6hpqrt.dylib'
   (fat file, but missing compatible architecture (have (i386,x86_64), need (arm64e)))