Couldn't find a duplicate of my issue which I feel is odd. Can anyone confirm Electron 6+ on the App Store using electron-builder?
Pretty sure the problem is the brackets, I believe the uppercase letters isn't.
workaround - change node_modules/app-builder-lib/out/electron/electronMac.js line 178
to
helper.CFBundleIdentifier = `${helperBundleIdentifier}.${postfix.replace(/[^a-z0-9]/gim,"")}`;
I had the same issue, thankfully @gaodeng's solution seems to have worked.
Most helpful comment
workaround - change node_modules/app-builder-lib/out/electron/electronMac.js line 178
to