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Nebulosity with Canon on Mac


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I upgraded to Mac OS Catalina and the 64 bit version of Nebulosity. All working fine on 9 Dec with my astromodified Canon 5d mkii.

Then 2 nights ago I couldn’t get it to connect at all. 

Got and error unable to open session 2 then can connect to Canon EOS. 

Anyone else having similar problem, or if it’s  just me able to suggest a solution?

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Catalina has some issues with USB it seems from reports too.

When you connect the camera to USB can you see it in OSX?

Hold down Alt when you have the apple menu open (menu from the top left) - "About this Mac" then becomes "System Information". Navigate to the USB part of the tree and you should see all the USB devices it recognises.

Edited by NickK
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