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backupd

Does removing I/O throttling make backups faster?

Can you get Time Machine to back up faster by turning I/O throttling off? If so, it this something to do only for large backups, or can it be set as the default? Does it also affect other background processes?

February 28, 2022 Macs, Technology

Understanding and managing Time Machine snapshots

Why Time Machine makes snapshots, and how they can grow and apparently consume free space. What you can and should do to manage this.

February 15, 2022 Macs, Technology

Why Time Machine backups can be interminably slow

Is it overhead from sandboxing, the file system, the throttling of I/O, or the limitations of the Efficiency cores? Is there anything a user can do?

January 20, 2022 Macs, Technology

Time Machine to APFS: Initiating an auto backup

How the start of Time Machine backups to APFS volumes is scheduled and dispatched, and a fascinating Secure Backup Daemon.

March 9, 2021 Macs, Technology

Time Machine to APFS: Evolution

How Time Machine has changed since it appeared in 2007, and how backing up to APFS volumes is different now it’s available in Big Sur.

March 4, 2021 Macs, Technology

Time Machine has changed again in Catalina

Time Machine backups made by Catalina are not compatible with earlier versions of macOS such as Mojave. Here’s how they have changed.

November 14, 2019 Macs, Technology

What’s the time, Mr Mac? How summer time confuses macOS

When you find one, bugs will necessarily be multiple. If you think you’ve found one, you can be fairly confident that you’ll find more. Four bugs in macOS for the price of one.

November 1, 2019 Macs, Technology

Checking Time Machine in Mojave (and High Sierra) using T2M2 1.4

T T Read More

Adds support for local snapshot statistics, Dark Mode, fixes a bug, and is now notarized for your added security.

October 24, 2018 Macs, Technology

How Time Machine makes backups

Detailed comparison of how Time Machine backs up HFS+ and APFS volumes, including its use of local snapshots, with diagrams.

October 17, 2018 Macs, Technology

xattr: com.apple.metadata:_kTimeMachineOldestSnapshot, old backup details

Found in Sierra, but seems to have fallen into disuse, and not found in High Sierra.

December 29, 2017 xattr

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