If your Mac doesn’t work, you can do this using a second Mac and an external hard drive caddy. It’s easy to reformat your hard drive using Disk Utility in macOS or OS X. Disk Utility can be used to format external drives as well. If you don’t want to lose data from your hard drive, export the data or back it up before continuing. You may need to reformat your new hard drive before installing macOS or OS X on it. macOS could not be installed, how-to fixįormat your new hard drive for macOS or OS X.How to create a macOS Catalina USB installer.Factory reset MacBook Air and other Macs with macOS.How to downgrade from macOS Mojave to macOS High Sierra.Or use the OS X installation disc that came with your machine - or buy a new one - to boot up and install OS X on your Mac’s hard drive.Download the relevant macOS or OS X installer from Apple, then use Terminal to create a USB installer you can boot up from.Install macOS or OS X from Internet Recovery Mode, which you can boot into by holding option+command+R while your Mac powers up.If you’re tech-savvy but don’t know where to start, use these Quick Tips to point you in the right direction for getting macOS or OS X on your drive: Simply follow the instructions below to install the latest compatible version of macOS or OS X on your new hard drive. So, it doesn’t matter if you want a clean slate on a second-hand MacBook or if you replaced the drive in your age-old machine, we’ve got you covered. In this article, we’ve given detailed instructions for each method.

Fortunately, there are also several ways to do it, ranging from Internet recovery to installation discs. And if you could see all your files in the scan result and preview them, then activate the software to save the recoverable files to your Mac.Ĭompare various editions of Stellar Data Recovery Professional for Mac.There are several reasons you might need to install a new copy of macOS or OS X on the hard drive in your Mac or MacBook. You can try the free trial version of the software. If mounting fails as well, then try repairing the drive.Īnd if none of the above methods work, then use Stellar Data Recovery Professional for Mac to restore your data. In case the drive is greyed out, then mount the drive. If the external hard drive is accessible from Desktop or Finder, then copy the files to the Mac. If you've already taken back up of your Mac using the Time Machine, you can easily restore data after Mac hard drive replacement.īut if there is no Time Machine backup, then you must connect the affected hard drive as an external device to the revived Mac containing the new drive.

Followed by the need of restoring your data from the old drive to the new. ConclusionĪt some point in time, you may need to replace your old Mac hard drive with a new one. To save your recoverable files, activate the software. *The trial version of Stellar Data Recovery Professional for Mac allows free drive scanning and free file preview.

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