I just downloaded the dev kit for 22 and the AddOnAdmin.app still does not work with my Mac. Throws an exception. i have to go back to ver. 19 to get one that works which is very strange. - YES, i have reported this before. --- High Sierra - 10.13.5 Mac Book Pro (2013) i assume this is some kind of security issue but wish Graphisoft would pay some attention to this. This is getting old!!
YEP -- Seems too? -- I tried it with two different XML Files in that directory. One being the the default XML and my working file. I never get to the stage that I can open a file as it throws an exception immediately -- Again -- version 19 still works fine. I think that at some point version 21 worked with some version of mac also but stopped working with a later release of the op system.
Which is why I think its a security problem which I can't figure out -- But with no help from Graphisoft i am at a disadvantage.