installer information on the recovery server is damaged macos sierra

These days it's rare to find a Mac with a optical drive, let alone find someone who has their original discs - not that Macs have shipped with install discs in recent times. A problem, but luckily there are solutions available.īack in the days before Mac OS X Lion launched in 2011 there wasn't a Recovery partition, instead you needed to have a physical disc with the software on it and an optical drive to insert it into. It's a problem if you need to reinstall the operating system from scratch and the Recovery partition is missing or for some reason you can't access.

We look in detail at what you can do in Recovery mode here. Even if you completely wipe your Mac, and start again from scratch, the Recovery partition should still be there to make it possible to reinstall macOS, restore from your Time Machine backup, and repair or erase your hard disk. But there are actually four partitions, and one is used in extreme cases where you may want to completely reinstall the operating system macOS (or Mac OS X on really old Macs). You're used to only seeing one room in the house, the one which has your Desktop, Folders and Applications. (Read: How to partition a Mac hard drive or SSD, or create a APFS volume for more information.) Think of your hard drive as the house, and the partitions as different rooms. A hard drive is typically a single volume, but it is then split up into multiple areas, known as partitions or volumes. They just see the whole drive as one thing. Most people don't really think about their hard drives (well, SSD these days) in terms of partitions. What is Mac Recovery?Ī quick word on what Mac Recovery mode can do and how it works.

If you want to learn how to reinstall Mac OS using Recovery Mode we cover that in a separate article (via the link above).

We'll look at the best solutions to these problems below. But what do you do if Mac recovery mode isn't working or Command + R doesn't work? You can access the Recovery mode via the keyboard combination Command + R on an Intel Mac (the process on an M1 Mac is slightly different as we will discuss below). There's a simple way to do this using your Mac Recovery partition or via Mac Internet Recovery. In the event of a serious problem with your Mac, you may need to reinstall your Mac operating system.

Installer information on the recovery server is damaged macos sierra