How do I reinstall OS X on a new hard drive?
Briefly press the power button, then immediately hold the option key while your Mac boots up. Keep holding option until a disc appears on the startup selection screen. If your disc never appears, repeat these steps holding the C key instead. Choose to boot up from your OS X installation disc.
How do I reinstall OS X on my IMAC which only has Ubuntu installed on it?
Use Command (⌘) Option R key sequence at startup to boot from the Internet. Use the Disk Utility application to reset Mac to a single Mac Os Extended (Journaled) partition. Make sure you are using a GUID Partition Table. Quit Disk Utility application and choose to install OS X from the Menu bar.
How do I install macOS on a new SSD?
Using the built-in Internet Recovery Mode (macOS Utilities menu) you don’t need to create your own bootable installer in order to install a fresh macOS onto your new SSD.
Can you install macOS on a blank hard drive?
Once you have your system installed (even before you install XCode), do a Time Machine backup so that you have an image of your system in it’s pristine state in case you have to install macOS on a blank drive again. Yes. You can install macOS Sierra as per the Apple support document, macOS Sierra – Technical Specifications.
How do you install OS X on a Mac?
Install macOS or OS X from Internet Recovery Mode, which you can boot into by holding option+command+R while your Mac powers up. Download the relevant macOS or OS X installer from Apple, then use Terminal to create a USB installer you can boot up from. Or use the OS X installation disc that came with your machine — or buy a new one — to boot up
How can I install macOS Sierra On my iMac?
You can download macOS Sierra by following the instructions in the Apple support document, How to download macOS Sierra. Once downloaded, create a bootable USB key by following the instructions in this Apple Support article, How to create a bootable installer for macOS.