Make hard drive partition bootable mac

If you have a large external hard drive, you can easily partition it so that the entire drive gets utilized. I was using a 1. As you can see, each partition can have its own file format. If you have an even larger drive, you can create even more partitions for other operating systems like Linux, etc.

Yours will look a little bit different than mine.

How to make a bootable Lion install disc or drive

Under the External heading on the left hand side, you should have one hard drive instead of 3 I have already partitioned mine. Navigate to that external hard drive and partition it according to your needs. If your external hard drive is not formatted for the Mac operating system, you may first need to Initialize it and then Erase it.

Note that you can also click on Security Options and choose from different levels of security. By default, OS X will use the fastest method, which not does securely erase the drive. If you move the slider to Most Secure, it will meet the DOD standard for erasing data by overwriting the data 7 times.

bootcamp - How can I make my Mac partition bootable again? - Ask Different

This will prevent anyone or any software from recovering any previously written data from the drive. OS X may ask you if you want to use the drive for Time Machine backups, but you should choose Decide Later unless you want to use the entire drive for the backups.


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Go to the top where it has the options: When a Macintosh boots, the following sequence of events occur:. The gist of all of this is that every bootable volume must indicate the location of the system folder. The inode is basically like a street address for the file, it indicates where on the disc platter the folder is located. For example:.

The "Blessed System File" information indicates where the secondary boot loarder "booter" resides. If you ever need to bless a volume manually for example, if CCC indicated that it was unable to bless the volume , you could run this command in the Terminal application:. It is important to note that blessing a volume is different than specifying a boot device.

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Blessing a volume simply updates the information in the HFS Volume Header that indicates where the blessed system folder and file are located. When you specify a particular volume as the startup disk, on the other hand, the computer stores a reference to that volume in the "Non volatile RAM" — basically a small section of RAM whose contents are not lost when the machine loses power or is shutdown.

The importance of this disctinction, and all five of these rules for that matter, is that simply setting a volume as the startup disk may not be sufficient to actually boot from that volume.


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Skip to main content. Knowledge Base ccc4 What makes a volume bootable? What makes a volume bootable? This article is for an older version of CCC. You can find the latest version here. Printer-Friendly Version Product: Bootability comes down to a few simple rules: The hard drive enclosure must support booting a Macintosh applies to external hard drives only.

Use Disk Utility to clone your drive - See this article: By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies. Home Questions Tags Users Unanswered. Ephemera Ephemera 11 Gordon Davisson Gordon Davisson Diorite Diorite 1.

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How To Create Disk Partition in Mac OS Sierra and Other OS X

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