diff --git a/dependency_install_steps_by_platform/macOS.md b/dependency_install_steps_by_platform/macOS.md
index a6b8437..23e4e71 100644
--- a/dependency_install_steps_by_platform/macOS.md
+++ b/dependency_install_steps_by_platform/macOS.md
@@ -2,13 +2,13 @@
 
 This document assumes you are starting from a fresh install of macOS.
 
-Most recently tested 2021-09-21 with the following macOS release:
+Most recently tested 2021-12-14 with the following macOS release:
 
 ```
 % sw_vers
 ProductName:	macOS
-ProductVersion:	11.5.2
-BuildVersion:	20G95
+ProductVersion:	12.0.1
+BuildVersion:	21A559
 ```
 
 
@@ -46,13 +46,13 @@ $ brew upgrade <formula name>
 
 Homebrew has a search page you can use to look up formula names: http://formulae.brew.sh/
 
-Most recently tested 2021-09-21 with the following Homebrew release:
+Most recently tested 2021-12-14 with the following Homebrew release:
 
 ```
 % brew --version
-Homebrew 3.2.13
-Homebrew/homebrew-core (git revision 9a917cc5fcd; last commit 2021-09-21)
-Homebrew/homebrew-cask (git revision 0892bc690f; last commit 2021-09-21)
+Homebrew 3.3.8
+Homebrew/homebrew-core (git revision d50fec801e7; last commit 2021-12-14)
+Homebrew/homebrew-cask (git revision 9e847b02f5; last commit 2021-12-14)
 ```
 
 
@@ -66,39 +66,26 @@ that, the second attempt should succeed.
 $ brew install virtualbox
 ```
 
-Most recently tested 2021-09-21 with the following Virtualbox release:
+Most recently tested 2021-12-14 with the following Virtualbox release:
 
 ```
 % VBoxManage --version
-6.1.26r145957
+6.1.30r148432
 ```
 
 
 
 ## Install Vagrant
 
-As of 2021-09-21, the current vagrant version (2.2.18) conflicts with the most recent version of 
-vagrant-scp (0.5.7).
-
-Github issues for that version conflict:
-https://github.com/hashicorp/vagrant/issues/12504
-https://github.com/invernizzi/vagrant-scp/issues/46
-
-When that conflict is resolved, with a new release of vagrant or vagrant-scp or both, we should be
-able to `brew install vagrant` here. Until then, a workaround is to install vagrant 2.2.16:
-
 ```
-$ curl -O -L https://github.com/Homebrew/homebrew-cask/raw/015bd57c9637d517f1a814e46a1ece5de570c263/Casks/vagrant.rb
-$ brew install --cask ./vagrant.rb
+$ brew install vagrant
 ```
 
-(after the above steps the `vagrant.rb` file can be removed)
-
-Most recently tested 2021-09-21 with the following Vagrant release:
+Most recently tested 2021-12-14 with the following Vagrant release:
 
 ```
 % vagrant --version
-Vagrant 2.2.16
+Vagrant 2.2.19
 ```
 
 
@@ -109,11 +96,11 @@ Vagrant 2.2.16
 $ brew install gnupg
 ```
 
-Most recently tested 2021-09-21 with the following GnuPG release:
+Most recently tested 2021-12-14 with the following GnuPG release:
 
 ```
 % gpg --version
-gpg (GnuPG) 2.3.2
+gpg (GnuPG) 2.3.3
 libgcrypt 1.9.4
 [...]
 ```
@@ -122,7 +109,7 @@ libgcrypt 1.9.4
 
 ## Install Python 3.x
 
-As of this writing, python 3.8.2 is installed by default in macOS, which should work fine. You can
+As of this writing, python 3.9.9 is installed by default in macOS, which should work fine. You ca
 optionally install the 'python' homebrew package to get a later version.
 
 ```
@@ -132,11 +119,11 @@ $ brew install python
 Note that to run python 3.x you need to use the name `python3`; running `python` will run python
 2.x.
 
-Most recently tested 2021-09-21 with the following Python release:
+Most recently tested 2021-12-14 with the following Python release:
 
 ```
 % python3 --version
-Python 3.9.7
+Python 3.9.9
 ```
 
 
@@ -160,9 +147,9 @@ eval "$(direnv hook bash)"
 direnv also supports several other shells -- zsh, fish, tcsh, and elvish as of this writing. Its
 website includes instructions for enabling each of the shells it supports.
 
-Most recently tested 2021-09-21 with the following direnv release:
+Most recently tested 2021-12-14 with the following direnv release:
 
 ```
 % direnv --version
-2.28.0
+2.29.0
 ```