CHIRP

Instructions on download page (https://chirp.danplanet.com/projects/chirp/wiki/Download) for installing on macOS via brew do not currently work. The instructions say:

Homebrew users can install Chirp without the KK7DS runtime by running brew install tdsmith/ham/chirp and then running chirp from the terminal.

Running brew install tdsmith/ham/chirp results in the following output:

brew install tdsmith/ham/chirp
Updating Homebrew...
==> Auto-updated Homebrew!
Updated Homebrew from 78140cef4 to ef12e329a.
Updated 3 taps (homebrew/core, homebrew/cask and homebrew/services).
... 

==> Tapping tdsmith/ham
Cloning into '/usr/local/Homebrew/Library/Taps/tdsmith/homebrew-ham'...
remote: Enumerating objects: 3, done.
remote: Counting objects: 100% (3/3), done.
remote: Compressing objects: 100% (3/3), done.
remote: Total 65 (delta 0), reused 2 (delta 0), pack-reused 62
Unpacking objects: 100% (65/65), 13.17 KiB | 158.00 KiB/s, done.
Tapped 3 formulae (93 files, 57.4KB).
==> Installing chirp from tdsmith/ham
Error: No available formula with the name "pygtk" (dependency of tdsmith/ham/chirp)
==> Searching for a previously deleted formula (in the last month)...
Warning: homebrew/core is shallow clone. To get complete history run:
  git -C "$(brew --repo homebrew/core)" fetch --unshallow

Error: No previously deleted formula found.
==> Searching for similarly named formulae...
Error: No similarly named formulae found.
==> Searching taps...
==> Searching taps on GitHub...
Error: No formulae found in taps.
(base) russellmbp:~ seth$ brew install tdsmith/ham/chirp
==> Installing chirp from tdsmith/ham
Error: No available formula with the name "pygtk" (dependency of tdsmith/ham/chirp)
==> Searching for a previously deleted formula (in the last month)...
Warning: homebrew/core is shallow clone. To get complete history run:
  git -C "$(brew --repo homebrew/core)" fetch --unshallow

Error: No previously deleted formula found.
==> Searching for similarly named formulae...
Error: No similarly named formulae found.
==> Searching taps...
==> Searching taps on GitHub...
Error: No formulae found in taps.

It seems that pygtk has been removed from brew:

$brew search pygtk
No formula or cask found for "pygtk".