pw_env_setup: Add SSL error suggestion

Change-Id: Ifa45c0eb1b9e7de1de8b5b8322e64377626c628f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/48561
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Reviewed-by: Prashanth Swaminathan <prashanthsw@google.com>
Reviewed-by: Keir Mierle <keir@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>

pw_env_setup/py/pw_env_setup/cipd_setup/wrapper.py

diff --git a/pw_env_setup/py/pw_env_setup/cipd_setup/wrapper.py b/pw_env_setup/py/pw_env_setup/cipd_setup/wrapper.py
index bf30e27..04f3f2b 100755
--- a/pw_env_setup/py/pw_env_setup/cipd_setup/wrapper.py
+++ b/pw_env_setup/py/pw_env_setup/cipd_setup/wrapper.py
@@ -241,6 +241,10 @@
                 '\n'
                 '    sudo pip install certifi\n'
                 '\n'
+                'And if on the system Python on a Mac try\n'
+                '\n'
+                '    /Applications/Python 3.6/Install Certificates.command\n'
+                '\n'
                 'If using Homebrew Python try\n'
                 '\n'
                 '    brew install openssl\n'