How can you create a new accented or other character which doesn’t appear in Unicode? It depends on whether you want it in text, or PDF.
Unicode
Don’t use Unicode normalised Form C names for volumes in Disk Utility, as they cause havoc, and prevent Spotlight from indexing volumes.
Now lists the time of the start of all boots in the last 24 hours, and helps you with Unicode normalization problems.
How Café and Café are actually different, and only one of those can be a filename in macOS, despite APFS being a non-normalising file system.
When a “fixed” formatting string proves anything but fixed, then breaks without warning or even mention in a release note.
How Apple made changes to Foundation routines which format dates and times which can break their formatting when in 12-hour clock mode.
Normalises strings to any of the four standard Unicode normalisation forms C, D, KC or KD, supplied with source.
What’s the harm in using a tool to apply ‘styles’ to plain Unicode text in a tweet, or similar?
How to hide text so that it can’t be searched or analysed, and how file naming almost brought APFS down.
Universal App to obfuscate text using unusual Unicode code points which look the same but are different.
The Eclectic Light Company 