LSL on Mac Catalina iOS and Matlab

[RJCooperUCL]

Hi SCCN-

I have been using LSL successfully to stream data from a new type of high-density fNIRS device (www.gowerlabs.co.uk/lumo) to my Mac, but last week I updated the Mac OS to Catalina and Matlab 2019b. The LSL scripts seems to run fine, and does not yield any errors, but when I try to resolve a stream it finds nothing. I have checked with a windows laptop and the stream is definitely visible, and nothing else has changed on my Mac.

I have given Matlab all the security permissions I can, and have made sure the iOS will run apps downloaded from anywhere, but nothing is visible.

Are there any known issues with Catalina and LSL? Has anyone else seen this issue?

[cboulay]

This would be the first report for LSL, but I have seen reports of other problems with MacOS Catalina and Matlab scripts. One suggestion that seemed to work was to open a Terminal window and run sudo spctl --master-disable, explained here. Be warned: this might have dangerous security implications.

Let us know if that works (and restore your security settings after trying!). If that doesn't work then the next thing I'd suggest is to rebuild the LSL dylibs on Catalina then rebuild the mex files.

If you're still stuck after all that then please let me know and I will take a look next week.

[MichaelUM]

Hi SCCN,
I'm just following on this thread even though the problem is a bit different.
When connecting from MacOS Catalina (10.15.4) to a Windows 10 based LSL stream I get the following error:
data_receiver.cpp:340 ERR| Stream transmission broke off (The received test-pattern samples do not match the specification. The protocol formats are likely incompatible.); re-connecting...

This only happens if I connect across operating systems.
Any idea what I do wrong?

[tstenner]

That's likely a separate issue, so I've moved it to sccn/liblsl#76