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security

Quarantine and the quarantine flag

Most quarantine flags in your Mac aren’t on apps but documents. Details of how they’re added, what info they contain, and what they do.

October 29, 2020 Macs, Technology

Code signatures: 1 How they work, and stop working

The benefits of code signing for Mac users explained. How certificates are revoked, and what happens when they are. And there’s more to signatures than just the certificate.

October 28, 2020 Macs, Technology

XProtect: What do we know about it?

Where to find its data files, what each contains and does, when XProtect is called to scan software, and a list of known malware it should detect.

October 27, 2020 Macs, Technology

What happened with security updates and HP printer software?

Why many had problems, what they are exactly, what you can do about them, and how they should be prevented.

October 26, 2020 Macs, Technology

Last Week on My Mac: Are silent security updates a vulnerability?

The update to MRT 1.68 has caused problems with many Macs. Even if their cause is discovered, fixing them is usually long and complex. That silent security update is causing a denial of service.

October 25, 2020 Macs, Technology

Why have my HP printers stopped working? How to check their software signature

Many users are today reporting that their HP printer software has suddenly stopped working, with worrying messages implying […]

October 23, 2020 Macs, Technology

MRT: what do we know about it?

The macOS Malware Removal Tool – what is it, where is it, what does it do and how does it run? And a curious story about its recent past, when it was used to remove non-malware.

October 23, 2020 Macs, Technology

SilentKnight version 1.11 now supports individual updates

New feature: an updater window which allows you to download and install individual named updates, rather than having to install all that are available.

October 21, 2020 Macs, Technology, Updates

Apple has pushed updates to XProtect and MRT

Apple has pushed two updates today, to the data files used by XProtect, bringing its version number to […]

October 19, 2020 Macs, Technology, Updates

How does your Mac know when Apple revokes a developer certificate?

Where does macOS store a list of revoked certificates, and how does it keep them up to date? The answer isn’t perhaps what you expect.

October 16, 2020 Macs, Technology

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