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Explainer: .DS_Store files

Many folders have them. They’re so invisible that you can’t even see them when you show hidden files. And the only way you know they’re there is when they cause problems.

November 27, 2021 Macs, Technology

How to run commands and scripts on Efficiency cores

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Although there doesn’t appear to be any straightforward way to run command tools or scripts only on Efficiency cores, there are ways and means.

September 14, 2021 Macs, Technology

How Rosetta complicates call chains on M1 Macs

Two basic rules: M1 Macs run Arm-native code when it’s available, but won’t mix ARM-native and Intel code in the same process. Here are the details.

January 27, 2021 Macs, Technology

Controlling processes and environments

How can you run an app in a language different to that set for your system? Why doesn’t that work for command tools? And how difficult can a tool make controlling its environment?

December 10, 2020 Macs, Technology

Using Finder aliases from the command line with alisma, a new Universal binary

How can you create and resolve Finder Aliases at the command line? And two further utilities you may find helpful for working with Aliases.

September 1, 2020 Macs, Technology, Updates

Why privileged commands may never be allowed

Running an AppleScript which tries to run a shell command with root privileges can fail. Here’s why, and what we can’t do about it.

February 15, 2020 Macs, Technology

Watch that space: More fun with Unicode in file names

How can you put four files with apparently identical names in the same folder? Here’s the secret, and the magic of Unicode.

January 11, 2020 Macs, Technology

Are you ever likely to use Terminal in Catalina?

Do you know how to customise the zsh shell now standard in Catalina? Here’s an excellent book which covers it in detail – and curious choice in 10.15.

November 23, 2019 Macs, Technology

How do the Finder, Terminal and Spotlight handle extended attribute flags?

Does using xattr flags disrupt Spotlight indexing, and how are those flags respected using different methods of copying a file?

July 26, 2019 Macs, Technology

How to build an APFS bootable clone in Terminal

I’m sure this used to be much easier in HFS+, but here’s a detailed set of instructions for making a bootable clone in High Sierra or Mojave, for an APFS disk.

December 29, 2018 Macs, Technology

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