This article explains why you should avoid using the version of Ruby bundled with Mac OS X and should instead install your own version of Ruby with RVM, the Ruby Version Manager.

Hands Off the System Ruby

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Apple bundles the Ruby programming language with OS X. However, the main caveat for using the bundled version, called the system Ruby, is that Apple bundles Ruby for it’s own use. Therefore, it’s best not to make changes to the system Ruby.

You’ll know when you’re about to change the system Ruby when you need to prefix a gem installation with sudo, for example:

Another reason for not using the system Ruby is that it’s often several versions behind the latest stable version.

The Ruby Version Manager

A better alternative to using the system Ruby is to install Ruby with RVM, the Ruby Version Manager. RVM is a tool for installing different versions of Ruby itself. RVM has the following advantages:

RVM enables you to install multiple versions of Ruby and allows you to change which version you want to use.
RVM installs each version of Ruby in a hidden folder in your home folder so each version of Ruby you install doesn’t affect the system Ruby.
Gems installed by RVM-managed versions of Ruby are installed within the hidden folder in your home folder containing that version of Ruby.
You won’t need use sudo to install gems.

To check that you’re currently using the system Ruby, open Terminal and type the following:

If you’re using the system Ruby, OS X will respond with:

You can check which version of Ruby OS X is using with:

Installing RVM and Ruby

The RVM install page has comprehensive instructions for installing RVM that work on Mac OS X. I’ll provide the steps I used here.

The first step is to install the mpapis public key. However, as the install page notes, you might need gpg. Mac OS X doesn’t ship with gpg so before installing the public key, you’ll need to install gpg. I installed gpg with Homebrew:

After you’ve installed gpg, you can install the mpapis public key:

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I've listed the mapis public key install command here for illustration. You should use the version on the RVM install page.

I chose to install RVM with the latest stable version of Ruby, which at the time was 2.2.0:

After the installation completes, close the Terminal window and open a new one to make sure that Terminal picks up any environment changes.

Using RVM

You can list the versions of Ruby available to RVM with rvm list:

Install Gem For Mac High Sierra

The rvm use command selects a version of Ruby:

You can check that you’re using an RVM-managed version of Ruby with:

OS X now responds with:

Install Gem For Mac Mojave

which tells us we’re using version 2.2.0 and that version 2.2.0 has been installed in my home folder away from the system Ruby. You can confirm this by asking Ruby itself with:

The RVM-managed version of Ruby responds with:

As I mentioned earlier, gems installed with RVM-managed versions of Ruby are located with the Ruby. You can check where gems will be installed with:

The following lines of output shows that gems will be installed in the folder XXX.

To find out where a particular gem is installed, use the gem which command. For example, gem which jekyll locates the Jekyll gem:

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Let's find out the prerequisites to install GEM on Windows PC or MAC computer without much delay.

Select an Android emulator: There are many free and paid Android emulators available for PC and MAC, few of the popular ones are Bluestacks, Andy OS, Nox, MeMu and there are more you can find from Google.

Compatibility: Before downloading them take a look at the minimum system requirements to install the emulator on your PC.

For example, BlueStacks requires OS: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP2, Windows XP SP3 (32-bit only), Mac OS Sierra(10.12), High Sierra (10.13) and Mojave(10.14), 2-4GB of RAM, 4GB of disk space for storing Android apps/games, updated graphics drivers.

Finally, download and install the emulator which will work well with your PC's hardware/software.

How to Download and Install GEM for PC or MAC:

Install Gem Mac Brew

Install Gem For Mac Catalina

Open the emulator software from the start menu or desktop shortcut in your PC.
Associate or set up your Google account with the emulator.
You can either install the App from Google PlayStore inside the emulator or download GEM APK file from the below link from our site and open the APK file with the emulator or drag the file into the emulator window to install GEM App for pc.

Install Gem For Mac Os

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