More specific error messages

[BrigitteDausH]

When Sparkle detects insufficient storage space during an update download, it reports a general error: "An error occurred while downloading the update. Please try again later."

It would be helpful if the message could be expanded to also include the reason for the error (if identifiable).

[zorgiepoo]

Maybe. Sparkle doesn't detect specific failures at this level per-say. It's the underlying NSURLSession error that might have this specific error reasoning (you could verify to see what is logged in Console app). Usually the underlying error is not matched case by case basis and it's not always clear if the underlying error will help the user or is formatted the way we intend, so right now it's just logged to for developers / collecting diagnostics. More specific messages for the same "general error" that we would tailor on the other hand may create more work for localizers.