Pyusb - Errno 13访问被拒绝进行控制转移 - Mac OS X.

我试图通过pyusb通过Mac OS发送控制传输命令:dev.ctrl_transfer(0x21,0x09,0x0200,0x0,0x1)

我收到错误:

Traceback (most recent call last):
  File "./main.py", line 21, in 
    dev.ctrl_transfer(0x21,0x09,0x0200,0x0000,0x0001)
  File "/Library/Python/2.7/site-packages/usb/core.py", line 962, in ctrl_transfer
    self._ctx.managed_claim_interface(self, interface_number)
  File "/Library/Python/2.7/site-packages/usb/core.py", line 146, in managed_claim_interface
    self.backend.claim_interface(self.handle, i)
  File "/Library/Python/2.7/site-packages/usb/backend/libusb1.py", line 747, in claim_interface
    _check(self.lib.libusb_claim_interface(dev_handle.handle, intf))
  File "/Library/Python/2.7/site-packages/usb/backend/libusb1.py", line 552, in _check
    raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 13] Access denied (insufficient permissions)

有人可以帮我弄这个吗.我试过sudo,su.我也在pyusb github用户组中发布了这个.我得到了这个(将自己添加到debian系统中的plugdev组)作为一种可能的解决方案,但我不知道如何继续使用Mac OS https://github.com/braiden/python-ant-downloader/issues/30# issuecomment-55293142

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