Hi All. Im new to everything bitcoin. This is my first post.

I am trying to install electrum on my mac desktop. Downloaded GPG keychain, electrum dmg and electrum asc files.

Installed thomas V's key on GPG using key from here: https://bitzuma.com/posts/how-to-verify-an-electrum-download-on-mac/

When I attempt to verify signature of the electrum dmg file, it says 'untrusted file' 'signature not to be trusted'

Ive tried many times, downloading the files form electrum.org, reinstalling thomas v's key in GPG, but always the same response when i try to verify.

Can anyone offer any assistance? From what i see, the electrum.org dmg file is corrupted, but there's probably something I'm not doing right.

Thanks

Cor