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However, Apple may be unable to offer service if they find out you replaced the hard drive in your Mac yourself, since this violates the terms of use.

Fortunately, there are also several ways to do it, ranging from Internet recovery to installation discs.

Simply follow the instructions below to install the latest compatible version of macOS or OS X on your new hard drive.

If you dont want to lose data from your hard drive, export the data or back it up before continuing.

Its easy to reformat your hard drive using Disk Utility in macOS or OS X.

If your Mac doesnt work, you can do this using a second Mac and an external hard drive caddy.

Otherwise, you can skip this step and do it from the Utilities page during the macOS or OS X installation.

The simplest way to install macOS or OS X on a new hard drive is by using Internet Recovery Mode.

This mode is only available on Apple computers made after 2009 that were running OS X Lion or later.

The entire process may take several hours depending on the quality of your Internet connection.

This is a USB flash drive with a specific macOS or OS X installer on it.

You can boot your Mac from the USB flash drive to install the software on your Macs hard drive.

To create a bootable USB installer, you need a working Mac and you need to be comfortable using simple Terminal commands.

This gives you the best security against malware and allows you to enjoy the latest available features.

So if you dont install the latest compatible version first, you might end up needing to pay twice.

Make An Disk So Serial Number Printed On

Otherwise, find the serial number printed on the bottom or on the back of your Mac.

Enter your serial number into the Check Coverage page on Apples website.

Start at the top of the list with the newest release and work back until you find your latest compatible software.

Terminal doesnt show anything as you type the password, so make sure you enter it correctly.

If you dont have it, you can still buy OS X installation discs from Apple.

If your disc never appears, repeat these steps holding the C key instead.

Visit the Get Support website to speak to an advisor online or make an appointment at your nearest Apple Store to see a Genius.

Make An Iso Install Disk For Mac So