No, data…
for example, for FSOpenFork :
I found :
"FSOpenFork (page 590) Deprecated in OS X v10.8 Opens any fork of a file or directory for streaming access. (Deprecated. At the POSIX/BSD layer, use open(2) OS X Developer Tools Manual Page and flock instead. To open a data fork at the Foundation layer, use NSFileHandle APIs instead.)"
but that doesn't help…
that's how I used it :
xErr := FSOpenFork(xx_ref, xx_ULL.ull_hfs_dfn.length, @xx_ULL.ull_hfs_dfn.unicode, x_prm, x_rfn)
It worked well and still work well
but on HFS+
On the new format, there are problems if many users try to access the same file