OSX lacks the usbutils
package. Sometimes you feel compelled to do hardware development in OSX, and it's nice to know if a device is enumerating properly.
To pull this off, run
system_profiler SPUSBDataType
It may be helpful to alias this command to lsusb.
You can either make a script containing the above command or add
alias lsusb='system_profiler SPUSBDataType'
to your .profile file.