I encountered this issue when I was trying to spin up a new React Native project. This is how I fixed it.
<ul>
<li>First, update brew</li>
</ul>
<pre><code class="lang-javascript">brew update
</code></pre>
<ul>
<li>Use brew to install ruby-build</li>
</ul>
<pre><code class="lang-javascript">brew install ruby-build
</code></pre>
<ul>
<li>Use brew to install rbenv</li>
</ul>
<pre><code class="lang-javascript">brew install rbenv
</code></pre>
<ul>
<li>Then go ahead to install the rbenv version you need. In our case, it is version 2.7.6</li>
</ul>
<pre><code class="lang-javascript">rbenv install 2.7.6
</code></pre>
<ul>
<li>Next, set the new version to be global</li>
</ul>
<pre><code class="lang-javascript">rbenv global 2.7.6
</code></pre>
<ul>
<li>Finally, export the following configurations to define rbenv as default global ruby</li>
</ul>
<pre><code class="lang-javascript">echo 'export PATH="$HOME/.rbenv/bin:$PATH"' &gt;&gt; ~/.zshrc
</code></pre>
<ul>
<li>And</li>
</ul>
<pre><code class="lang-javascript">echo 'eval "$(rbenv init -)"' &gt;&gt; ~/.zshrc
</code></pre>
Finally kill the terminal and restart it. Now you can succesfully create a new React Native project.

I encountered this issue when I was trying to spin up a new React Native project. This is how I fixed it.

* First, update *brew*
    

```javascript
brew update
```

* Use brew to install *ruby-build*
    

```javascript
brew install ruby-build
```

* Use brew to install *rbenv*
    

```javascript
brew install rbenv
```

* Then go ahead to install the rbenv version you need. In our case, it is *version 2.7.6*
    

```javascript
rbenv install 2.7.6
```

* Next, set the new version to be global
    

```javascript
rbenv global 2.7.6
```

* Finally, export the following configurations to define rbenv as default global ruby
    

```javascript
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.zshrc
```

* And
    

```javascript
echo 'eval "$(rbenv init -)"' >> ~/.zshrc
```

Finally kill the terminal and restart it.  
Now you can succesfully create a new React Native project.

How to fix "error Your Ruby version is 2.6.8, but your Gemfile specified 2.7.6" in React Native