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integrity

How should we check the integrity of important files?

What are the performance differences between SHA-256 and 512? What throughput can you expect when checking hashes? And how to correct errors detected?

June 1, 2023 Macs, Technology

Apple’s big test of data integrity

Since November 2020, every T2 and Apple silicon Mac that has booted Big Sur or later in Full Security mode has check the integrity of its 9 GB SSV.

May 30, 2023 Macs, Technology

Last Week on My Mac: Should we be worried about data integrity?

From its outset, APFS hasn’t tested the integrity of file data stored on it. Would this be a good idea, or should macOS switch to the ZFS file system instead?

May 28, 2023 Macs, Technology

Monitoring file integrity with updates to Dintch and Fintch

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APFS has no feature to check file data integrity. Dintch and Fintch are two apps that tag files with SHA-256 hashes to address this. New versions.

May 25, 2023 Macs, Technology, Updates

Maintaining the integrity of important files

How to do this using macOS and free tools. Introduces a new version of Dintch which lets you control its speed, particularly on Apple silicon.

June 15, 2022 Macs, Technology, Updates

Efficient resilient storage

Storage has to be reliable, efficient and resilient. However, efficiency and resilience oppose one another. What’s the best solution? New file formats, CRC in the file system, or what?

May 27, 2022 Macs, Technology

What’s in an app’s signature?

App signatures are about more than just the certificate. That provides a chain of trust going back to Apple, and supports integrity checks and entitlements.

March 8, 2022 Macs, Technology

How Monterey checks apps and executable code

There have been changes to the way that macOS 12 checks executable code when asked to run it. Summarised in a diagram.

March 4, 2022 Macs, Technology

How can you check the integrity of backed up files?

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For many users, it’s essential to be able to check the integrity of the data which are in a backup. This feature has changed when backing up to APFS.

November 29, 2021 Macs, Technology

Explainer: checksums, CRCs, hashes and cryptography

What are checksums, CRCs and hashes? What is required for a hash to be cryptographic, and how any of these affect your Mac? Some answers and explanations.

July 10, 2021 Macs, Technology

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