brew tap timescale/tap

brew install timescaledb

If could not execute pg_config --version

echo 'export PATH="/Applications/Postgres.app/Contents/Versions/latest/bin:$PATH"' >> ~/.zshrc && source ~/.zshrc

Run timescaledb-tune

timescaledb-tune --yes --conf-path=/Users/<user_name>/Library/Application\ Support/Postgres/var-<pg_version>/postgresql.conf`

Navigate to /opt/homebrew/Cellar/timescaledb/ and you will see folder with some number, it is nothing but timescaledb version.

Make sure your terminal has Full Disk Access to files and folders if you get Operation not permitted.

Then run the following scripts, make sure to change <pg_version> and <timescaledb_version> for the ones you have.

/usr/bin/install -c -m 755 $(find /opt/homebrew/Cellar/timescaledb/<timescaledb_version>/lib/timescaledb/postgresql@<pg_version>/ -name "timescaledb*.dylib")  /Applications/Postgres.app/Contents/Versions/<pg_version>/lib/postgresql

/usr/bin/install -c -m 644 /opt/homebrew/Cellar/timescaledb/<timescaledb_version>/share/timescaledb/* /Applications/Postgres.app/Contents/Versions/<pg_version>/share/postgresql/extension/

Open Posgress.app and go to Server Settings and open the config file to make sure shared_preload_libraries = 'timescaledb' is there and then stop and start the app.