# Puma and PostgreSQL crash on M1 mac, Ruby on Rails 6.1

![](https://cdn.hashnode.com/res/hashnode/image/upload/v1724918052921/82782042-17dd-4046-bfe2-6df9df2e1db7.png align="center")

Have you encounter following bug when booting your M1 Mac machine when running PostgreSQL, Puma and Ruby on Rails application, this bug is frustrating but there is a really simple solution to this problem, which is to disable `PGGSSENCMODE`.

**Solution:**

```bash
export PGGSSENCMODE="disable"
```

put above code in your `~/.zshrc` or `~/.bashrc` file depending on which shell you are using.

I am using Zsh

```bash
echo $SHELL
/usr/bin/zsh
```

And finally, don't forget to reload your terminal, or restart your terminal.

```bash
source ~/.zshrc
rails s
```

It should fix that crash issue.