https://issues.dlang.org/show_bug.cgi?id=21433

          Issue ID: 21433
           Summary: "bash: line 952: --list-keys: command not found" when
                    running install.sh on Catalina
           Product: D
           Version: D2
          Hardware: All
                OS: Mac OS X
            Status: NEW
          Severity: normal
          Priority: P1
         Component: installer
          Assignee: nobody@puremagic.com
          Reporter: dlang-bugzilla@thecybershadow.net

Trying to install D using the install script on a fresh macOS 10.15 VM results in:

% curl -fsS https://dlang.org/install.sh | bash -s dmd
Downloading https://dlang.org/d-keyring.gpg
######################################################################## 100.0%
Warning: No gpg tool found to verify downloads.
bash: line 952: --list-keys: command not found
Broken GPG installation

The "No gpg tool found to verify downloads" message is expected. However, the following two are not.

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