j-link issue if used with Nordic EK j-link OB

Question

I wish to inform Nordic about this issue with jlink OB used on EK boards when used in OS X environment. 
 J-link OB returns " Can not connect to J-Link via USB." and a CDC disabling is due to establish a connection. 
 But, if I use j-link Lite Cortex M there are no problems, the connection is ready without disabling CDC. 
 All firmwares are updated. 
 Not fatal but annoying . 
 -c

cocoa · Accepted Answer

Thank you RK, I 've read it previously. 
 My doubts are starting from release Jlink version 4.74 (the last one in .dmg format). In README.txt Segger wrote : 
 Requirements
============
libusb is no longer required.

 
 So, I am inclined to think that starting from this version, libusb no longer used by Segger in OS X Jlink. 
 I've not installed any libusb on my mac. 
 But the main question here is why Jlink Lite cortexM-9 works fine without disabling CDC and Jlink OB on Nordic EK boards doesn't. 
 Any idea about ? 
 -c