Thanks Rory
eliminating all the “_” did not solve the detection problem in the DAW but in the meantime, good to know, I fixed everything. I tried several times to do the codesign but it always gave me the same error that is:
/Users/francesco/Desktop/KK10.vst: replacing existing signature
/Users/francesco/Desktop/KK10.vst: resource fork, Finder information, or similar detritus not allowed
Typing the commands xattr -lr KK10.vst lists all the files with problems.
then typing xattr -cr KK10.vst and re-typing the command sudo codesign -s - KK10.vst --timestamp --deep --force is finally successful and now the plugin is displayed without problems by all the DAWs
I currently have High Sierra in my mac, if I want to distribute this plugin for newer OSX versions I have to pay 99 $ per year as described here, am I right?
Instead, to make an export compatible with the M1 chip, do I have to have one at hand, install cabbage and export the vst from there? Always keeping the speech of the Apple developer account etc.