Open Terminal, which you’ll find in Applications > Utilities. Type /bin/bash -c “$(curl -fsSL https://raw. githubusercontent. com/Homebrew/install/master/install. sh)” and press Return. [1] X Research source Follow the on-screen instructions to install Homebrew. Once Homebrew is installed, type brew install gnupg and press Return.

An easy way to do this is from the command prompt is to cd into the appropriate directory and download the file using wget https://path/to/signaturefile. sig.

As with downloading the signature file, you can use wget to download the public key. If you have the key ID but not a path to download the file, use this command to get the key: gpg –recv-keys KEYID. If you receive the key this way, skip step 4 and go directly to step 5.

gpg –import PUBLICKEY. Replace PUBLICKEY with the actual file name. [2] X Research source

gpg –verify SIGNATURE. SIG FILE. Replace SIGNATURE. SIG with the signature file name, and FILE with the name of the file you want to verify. If the output says “Good Signature,” you’ve successfully verified the key. If the signature is bad, you’ll know the file is broken or has been edited since the signing.

The default installation location is C:\Program Files (x86)\Gnu\GnuPg\gpg. exe. When you run the command required to verify the signature, you’ll need to enter the full path to the gpg. exe file. If you choose a different install location, make sure you remember the full path. [3] X Research source

Type C:\Program Files (x86)\Gnu\GnuPg\gpg. exe –import PUBLICKEY and press Enter. Replace PUBLICKEY with the actual file name. If you don’t have a file containing the public key, but you do have a key ID, use this command instead: C:\Program Files (x86)\Gnu\GnuPg\gpg. exe –recv-keys KEYID.

C:\Program Files (x86)\Gnu\GnuPg\gpg. exe –verify SIGNATURE. SIG FILE. Replace SIGNATURE. SIG with the signature file name, and FILE with the name of the file you want to verify. If the output says “Good Signature,” you’ve successfully verified the key. If the signature is bad, you’ll know the file is broken or has been edited since the signing.