A quick and dirty circumvention of the check is to change line 373 in ~/.qgis/python/plugins/sextante/saga/SagaAlgorithm.py
to:
if "" in line:
(restart Qgis)

this way the modules do open since the check is basically disabled.
The original code should also though. Maybe it's encoding related.
When I execute a Saga module, this happens during saving the output:

An error has occured while executing Python code:

Traceback (most recent call last):
File "/Users/myaccount/.qgis//python/plugins/sextante/gui/OutputSelectionPanel.py", line 95, in saveToFile
    self.text.setText(str(filename))
UnicodeEncodeError: 'ascii' codec can't encode character u'\xff' in position 2: ordinal not in range(128)

Should I have compiled with a different locale set?

We are nearly there :-)

Olav


On 20/12/12 23:09, Victor Olaya wrote:
There is actually the following check in the case of mac and linux:

             command = ["saga_cmd"]
             proc = subprocess.Popen(command, shell=True,
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,stderr=subprocess.STDOUT,
universal_newlines=True).stdout
             for line in iter(proc.readline, ""):
                 if "________" in line:
                     settings.setValue(SAGA_INSTALLED, True)
                     return
             return "It seems that SAGA is not correctly installed in
your system.\nPlease install it before running SAGA algorithms."

basically, it is a naive check to see if executing saga_cmd in a
console returns something that looks like the SAGA CMD header. It
works fin in linux, but it seems it is not working in Mac. Are you
sure saga is in your path? if so, what do you see when you execute
saga_cmd? maybe the header is different for some reason?

Thanks in advance!

2012/12/20 John C. Tull <jct...@gmail.com>:
On Dec 19, 2012, at 2:49 AM, Victor Olaya <vola...@gmail.com> wrote:

Olav,

Thanks for your contribution!

There is no option "SAGA folder" in the SEXTANTE configuration like you have
when installing on Windows. I haven't checked on Linux, but I guess the
Unixes don't need this, as long as saga_cmd is in the path, right?
Right, Mac and Linux should work in the same way. Let me check,
because maybe in Mac it is performing the same check as in windows
(that is, checking that the SAGA folder is set...)

Looks like an easy to solve problem...i hope

Will keep you posted

Thanks again!


Victor
It looks like I'm a little late to the party on this. I confirm the same. I 
look forward to a solution on this for OS X. We can work on grass, perhaps, 
once that is resolved.

Regards,
John


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