A Universally Unique Identifier is a device-identifying string that is 128 bits long.

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tmutil reports changing UUIDs for external encrypted volume

(also asked at https://discussions.apple.com/thread/6451614) I'm trying to use Time Machine for monthly backups on an external hard disk with an encrypted volume. I erased the disk with Disk Utility ...
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Can one iPhone be registered to multiple Developer accounts?

I have an Apple iOS Developer account and I registered my iPhones UUID to this account (to create Provisioning Profiles, etc.). Is it possible to add this iPhones UUID to another iOS Developer ...
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MacBook Air serial number

I am seeking to find a Macbook Air serial number from within the backup files created by the Mountain Lion operating system and stored on an external hard drive. Exactly which file do I need to be ...
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How do the VolumeUUID and MediaUUID differ in their usage?

When viewing drives via DiskArbitration, we see volumes with MediaUUID and VolumeUUID but can't readiliy see the rhyme or reason behind them. What are good resources for reading the expected use for ...
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Booting problem after Mavericks installation: BootCache.playlist: 2 No such file or directory

I have updated my MacBook Air 2011 from the App Store to Mavericks but after the installation it doesn't boot up (spinning grey ball). Safemode or a new installation didn't help and verbose mode ends ...
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Is the UUID command missing in 10.8.2?

I just noticed that the uuid command is no longer working on my MacBook. One possibility is that it was removed when I upgraded to Mountain Lion. The man page is still available. man uuid Does ...
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How to get UUID with Python?

System Report will display the system's Hardware UUID in the format 01234567-89ab-cdef-0123-456789abcdef. Using the shell we can retrieve the same UUID: ioreg -rd1 -c IOPlatformExpertDevice | grep ...