Backblaze seemingly does not support files greater than 1 TB

Screenshot from Backblaze's website showing their claims about "Unlimited data, unlimited file sizes, unlimited drives", with an eyebrow-raised emoji overlaid.

For nearly a month now, Backblaze has been fixated on a particular file of mine, that happens to be over 1 TB in size. Backblaze seemingly uploads it completely, but then on the next backup it uploads it again, even though it has not changed (in eight years!). Ad infinitum. Using their Explainfile tool to… Read more

Proactive Peek & Reveal on Edge Hover

Screen capture video showing an attempt to grab the scroll handle and how it's foiled by Proactive Peak stealing the click away to resize a previously-closed sidebar.

These are two misfeatures that appeared in macOS Sonoma (I believe). They are where a closed sidebar forces its way back into view temporarily, if the mouse comes to rest near the relevant edge of the window. It’s easy to see how some UI designer thought this was a good idea. Surely if you move… Read more

SwiftUI drag & drop does not support file promises

SwiftUI doesn’t offer anything equivalent to NSFilePromiseProvider, i.e. to write data to the drop destination. You have to ditch SwiftUI and use AppKit’s drag & drop APIs instead. FB13583826. Is that it? I know that’s not a very helpful in some sense, but I wasted days trying to figure out how to implement this very… Read more

Bad API example: FileManager’s url(for:in:appropriateFor:create:)

I find FileManager‘s url(for:in:appropriateFor:create:) to be very unintuitive. It seems to have multiple, largely-orthogonal functions. It can provide paths to common folders (albeit badly). It can create temporary folders. It can locate volume-specific bins (Trash folders). It is an example of bad API design. Specifically, regarding cohesion: the principle that an API should have one… Read more

Creating files safely in Mac apps

Creating a file is a pretty basic and conceptually simple task, that many applications do (whether they realise it or not – library code often does this too, at least for temporary files such as caches or for communicating between programs). So you’d think it’d be trivial to do correctly. Alas, it is not. ☝️… Read more