#16 Can't install GnuPG-2.2.20.dmg on Catalina

[Ron Murray]

Double-clicking on the installer, as the README says, gets me this error:
"“Install.pkg” can’t be opened because Apple cannot check it for malicious software."
I'm fairly new to MacOS, but I've never seen this before. (I've been using PGP/GPG in various environments for over 30 years, though).

System details:
MacOS Catalina 10.15 4
MacBook Pro (15 inch, 2017)
16 GB 2133 MHz LPDDR3

[Ron Murray]

OK, I should have googled it first. If anyone else gets the same problem, try this:
https://www.minicreo.com/mac-uninstaller/app-cannot-be-opened-on-macos-catalina.html

[Matthew Bishop]

It's a bit of work but you should Notarize first. Instructions here: https://developer.apple.com/documentation/xcode/notarizing_macos_software_before_distribution

[Patrick Brunschwig]

I cannot notarize gpgOSX, as I build it on a virtual machine.

I added installation instructions that hopefully help those who install gpgOSX for the first time.