I can now report that on my older MacBookPro 8,2 (early 2011) laptop running OS X Mavericks 10.9.5, this problem no longer occurs.
However, I noticed in some earlier postings on the WSJT list, there was some speculation that this might be caused by some interaction between the SiLabs CP210x USB serial port driver and the USB codec driver. I have seen messages in the log like this that indicate the possible presence of this problem: 9/24/17 11:22:49.000 kernel[0]: WARNING: AppleUSBAudio has detected that a connected USB audio device is sending too much audio data. 9/24/17 11:22:49.000 kernel[0]: WARNING: This USB audio device may not function properly. Please notify the device manufacturer. The newest versions of that driver (5.0 and later) were updated for OS X 10.11 and later. Anyone trying this trick on OS X 10.10 and earlier would have to use the earlier 4.x versions of the SiLabs driver, so it may have more to do with the SiLabs driver than the OS X version? I'm contemplating bumping up to Yosemite (OS X 10.10) and seeing what happens. 73, On 22 September 2017 at 19:56, <wsjt-devel-requ...@lists.sourceforge.net> wrote: > Message: 3 > Date: Fri, 22 Sep 2017 22:55:39 +0100 > From: Bill Somerville <g4...@classdesign.com> > To: wsjt-devel@lists.sourceforge.net > Subject: Re: [wsjt-devel] OS X Audio Device Issues > Message-ID: <81a71c94-8873-27f1-d050-ecff71006...@classdesign.com> > Content-Type: text/plain; charset=utf-8; format=flowed > > On 22/09/2017 22:49, Larry Gadallah wrote: >> Does anyone have any references to any Apple bug reports/known issues >> that document the issue of USB audio devices becoming unreliable, >> and/or which versions of OS X where this problem emerged? > > Hi Larry, > > I don't have any Apple ticket numbers but the issues started in Yosemite > and only seem to effect certain motherboards. Several users have > reported that not using the USB ports by using a Thunderbolt to USB > adapter or Thunderbolt sound card avoids the problems, if your Mac > suffers them and has a Thunderbolt port. > > 73 > Bill > G4WJS. -- Larry Gadallah, VE6VQ/W7 lgadallah AT gmail DOT com PGP Sig: B5F9 C4A8 8517 82AC 16B6 02B6 0645 69F0 1F29 A512 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
