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certificates

Explainer: Keychain basics

What are keychains? What do they store? Which are essential on Macs, and why do you get prompted to enter your password for access to them? How secure are they in iCloud?

October 15, 2022 Macs, Technology

How to check an app’s signature

GUI software and the commands you need to get the signature of an app checked thoroughly by macOS, plus a detailed list of error code.

September 17, 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

Why do installer packages expire, but apps don’t? Signing certificate and notarization oddities

T T Read More

App signatures remain valid forever, but Installer packages are different, and their certificates can and do expire. What about notarization though?

February 8, 2022 Macs, Technology

Will Apple honour its promises on OCSP certificate checks?

Is Apple going to meet the promises it made a year ago, to protect its users around the world from the risk posed by its online signing certificate checks?

November 8, 2021 Macs, Technology

Brolly 1.1 now does its own testing of secure connections

T T Read More

Now checks which versions of TLS a server supports, and gives details of its full headers with caching disabled.

October 8, 2021 Macs, Technology, Updates

Brolly: a utility to help understand failed secure connections

A convenient utility to check secure connections under ATS using the nscurl command tool. For El Capitan to Monterey.

October 5, 2021 Macs, Technology

How Safari 15 checks a secure connection

A detailed walk through the log shows Safari 15 checking Safe Browsing, phishing sites using ML, and performing trust evaluation of certificates.

October 4, 2021 Macs, Technology

Last Week on My Mac: Web woes worsen

It should have been so easy: a quick change of Root certificate. So why all the chaos, and most of all why you mustn’t compromise your security as a result.

October 3, 2021 General, Macs, Technology

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