[Leica] What is Rosetta

[os.penguin at gmail.com (Forrest Herr)]

>> > and why must the later versions of PhotoShop be opened in it in order to
>>  >operate my scanners?

Rosetta is a layer of software that allows older binary (executable)
files compiled for Power-PC CPUs to run on the newer Intel x86 CPUs in
OSX.  My guess is that your scanner twain plug-ins are not compiled
for x86 CPUs so in order for them to work, you have to run photoshop
in rosetta.

>> > And what is the downside of defaulting to running PS in Rosetta all the
>> > time, is it slower or more unreliable?

The downside is likely a performance hit because the older binary
format is being translated to run on an x86 CPU

>> >How come the twain plug-ins aren't recognized/supported otherwise?

I would try looking for updated twain drivers/plugins for your
scanners if you're noticing  significant performance problems, or if
photoshop is crashing or broken in some way.

-Forrest