All three of my PreviewApps — PreviewMarkdown, PreviewCode and PreviewYaml — got big updates this week. Headline features: significantly improved font, style and colour selection, across-the-range stability improvements, and faster PreviewCode theme preview presentation.
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Looking for syntax highlighted QuickLook code previews? Look no further
I’d like to introduce you to the latest member of the PreviewApp family: PreviewCode, which provides syntax-coloured QuickLook previews and Finder icon thumbnails for over 50 programming languages, including Swift, Objective-C, C++, Rust, JavaScript and Python, and data file types for macOS. You can choose to preview your source code any of 100 dark and light themes.
Continue readingMNU now supports Mac terminal emulator iTerm2
MNU, my macOS menu bar utility that lets you call up regularly used command line operations and more, now supports iTerm2, the popular alternative to macOS’ own Terminal app.
Continue readingCrop picture files with confidence and pixel-precise offsets, using sips and imageprep
I recently had a rather large number of screenshots to process: specifically to crop them down to a small area about a third of screen width in and two-thirds of its height down. I could have done this manually, but it’s easy enough to make mis-crops when you’re cropping a couple of images by eye, let alone a 100 or so. The solution? Get your Mac to do it for you. Here’s how.
Continue readingLooking for YAML macOS QuickLook file previews? With PreviewYaml 1.0.0, you got ’em!
Last week I announced the release of a new version of PreviewMarkdown that will preview YAML front matter in Markdown files. Work on that release prompted me to code a new app that enables QuickLook previews and Finder icon thumbnails of YAML files.
Continue readingFontismo updated: more fab fonts for iOS folk
A new version of Fontismo, my iOS app that lets you install a selection of fonts on your iPhone or iPad, is now available.

How to share preferences between macOS/iOS apps
A couple of macOS releases or so ago, Apple introduced app extensions: self-contained modules that are bundled within apps to deliver functionality to the wider operating system. But how do apps and their extensions share information between themselves, in particular users’ preferences?
Continue readingOi, app makers, no! Enough Markdown monkey business!
PreviewMarkdown, my modern QuickLook plug-in for Markdown files, was recently updated to version 1.1.4. It was a minor change, which is why it wasn’t announced here, but the reason for the update may interest to anyone keen to understand the workings of macOS. It also highlights some inconsiderate behaviour on the part of some Mac software developers.
Continue readingJust released: imageprep 6.2.0 with powerful new features
imageprep, my command line tool for batch-processing picture files, had a big update a week or so back — and now it has another one. With the second update imminent, I didn’t announce the first, 6.1.0, which I released to coincide with my post on writing command line utilities in Swift. That done, it’s time to shout about imageprep 6.2.0.

Released: MNU and other updates
I’ve just posted updates to a couple of applications. Both can be grabbed from my website or installed using Homebrew.
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