All the time when I do a `git clone https://github.com/[REPO_NAME]` and then `cd` into the repo and run `bundle install` I get 

> 
> Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
> 
> 
> 
> ```
> /Users/name/.rvm/rubies/ruby-2.1.3/bin/ruby extconf.rb 
> 
> ```
> 
> **\* extconf.rb failed \*** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check
>  the mkmf.log file for more details. You may need configuration
>  options.
> 
> 
> 

And most of the time this has to do with an error occurring while installing `eventmachine`

Otherwise, all of the **rails app created by me can be ran locally** with no issues it just **do not work when I am trying to run locally git cloned app**.

I am just confused, I tried to change my ruby version, updated xcode and reset the gemfile.lock I just do not know whats wrong with my local environment.

Please I need some light as in what should I look into ? What should I check to make gem dependencies work when I am trying to run an app locally which is not created by me but that is a git cloned app?

Thanks a lot in advance to all the kind contributors.

**UPDATE:**

rvm -v: 

```
rvm 1.26.10 (latest) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]

```

rvm list: 

```
rvm rubies

   ruby-2.1.2 [ x86_64 ]
=* ruby-2.1.3 [ x86_64 ]
   ruby-2.1.5 [ x86_64 ]

# => - current
# =* - current && default
#  * - default

```

which ruby:

```
/Users/name/.rvm/rubies/ruby-2.1.3/bin/ruby

```

brew -v:

```
Homebrew 0.9.5

```

brew doctor:

```
otool: error: unable to find utility "otool", not a developer tool or in PATH
Error: Failure while executing: /usr/bin/otool -L /usr/bin/install_name_tool

```