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extensions

macOS Sequoia end of cycle report

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How frequent and large were macOS Sequoia’s updates? How has it grown in total system bundles and apps? Which categories have grown most?

August 8, 2025 Macs, Technology

How PlugInKit enables app extensions

How PlugInKit gets information about all installed app extensions, nd how it informs the services that use those extensions. Why killing the LaunchServices database may not be a good idea.

April 16, 2025 Macs, Technology

AppexIndexer build 8 has sort and search features

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New version of app extension explorer offers 4 sort orders, adds support for UUIDs, and a ‘live’ search feature to find a UUID quickly and efficiently.

April 14, 2025 Macs, Technology, Updates

Discover appexes with AppexIndexer

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Explore the app extensions installed on your Mac, in a list of well over 400, including many in macOS, and those in 3rd party products.

April 10, 2025 Macs, Technology, Updates

Rise of the Appex: What are App Extensions?

With as many as 500 or more appexes in your Mac, these have become widely used and important. What they are, where they are, and how to control them.

April 8, 2025 Macs, Technology

What changed in macOS Sonoma? End of term report

How has the System changed in numbers since Mojave? Why has the number of kernel extensions risen since their deprecation? Why so many Private Frameworks?

August 15, 2024 Macs, Technology

A short history of Mac OS extensions

Extensions or INITs in Classic Mac OS required Conflict Catcher for their management. But they remain a vulnerability, and can’t be used with full boot security any more.

June 29, 2024 Macs, Technology

Safe mode, caches and CacheDelete

What does Safe mode do to all those service caches managed by CacheDelete? Does it still check your boot disk too?

May 3, 2023 Macs, Technology

What are all those extensions?

Kernel extensions, system extensions, app/Finder/Safari extensions are all very different, as explained here.

February 18, 2023 Macs, Technology

What stops your Mac running incompatible extensions?

In one of only 3 kernel extension on your Data volume is a list of blocked kernel extensions. What protection from old and broken KEXTs does it provide?

December 21, 2020 Macs, Technology

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