Resolving Modern Mac Alias Files
There’s a big catch, however, which is that you must take care to pass the alias file’s URL as the “relativeTo:” parameter when resolving the bookmark. Otherwise the bookmark will resolve as expected in typical scenarios, but will fail to resolve in all the scenarios where bookmarks really shine, as for example in the case of moving a bookmark and its target to another volume.
[…]
The safety of ignoring staleness is supported by the fact that, starting in macOS 10.10, there is a new convenience method on NSURL specifically for resolving “alias files”[…]
