The goto to the internet as given by Wolfgang works here too, but other configurations do not. Please ascertain my observations from the test given below. You should replace the absolute path by your own, of course. Three cases are programmed:
(1) Wolfgang’s
(2) full path ftp:// access opens file but at last page opened
(3) local path does not open and brings up an Alert
Run from TeXShop and also directly in Preview and Adobe Reader with the same results.

Thanks in advance.

dr. Hans van der Meer


\starttext
\currentdate-\currenttime\quad\ConTeXt-version=\contextversion\blank
Testing directly from \ConTeXt:\blank
\setupinteraction[state=start,color=blue,style=italic]
\goto{Beginners manual called with http:// opens in browser as expected}[url(http://pragma-ade.com/general/manuals/mp-cb-en.pdf\letterhash page=50)]\blank
file test.pdf sits in the current directory.\blank
\goto{click test.pdf page10 with ftp:///Users/... (full path given) opens at last page opened not at page 10 in Apple's Preview}[url(file:///Users/hansm/TeX/Test-tex/gotopdf/test.pdf\letterhash page=10)]{\quad\bf Put your own path here!}\blank
\goto{click test.pdf page10 with ftp://test.pdf (local path)) does not open}[url(file://test.pdf\letterhash page=10)]\blank
\stoptext


> On 19 Apr 2018, at 02:07, Otared Kavian <otared@gmail.com> wrote:
> 
> Hi,
> 
> On my Mac, running MacOS High Sierra 10.13.5 Beta, the example given by Wolfgang works fine: clicking on the link created by ConTeXt, from within TeXShop, Safari opens that document on the desired page, that is the physical page 58.
> 
> Best regards: OK
> 
>> On 18 Apr 2018, at 23:04, Hans van der Meer <havdmeer@ziggo.nl <mailto:havdmeer@ziggo.nl>> wrote:
>> 
>> Thanks. But this seems not to work on my Macintosh. Not in Preview, not in Adobe Reader. 
>> Typesetting resulted in valid-url.pdf#page=55 but the document opens at the last page remebered by the application. Are there other Macintosh users who can confirm this is not working on those machines or should I do something else?
>> 
>> dr. Hans van der Meer
>> 
>> 
>>> On 18 Apr 2018, at 21:58, Wolfgang Schuster <schuster.wolfgang@gmail.com <mailto:schuster.wolfgang@gmail.com>> wrote:
>>> 
>>> For documents on the web you can add #page=<NUMBER> to the url.
>>> 
>>> \setupinteraction[state=start]
>>> 
>>> \starttext
>>> \goto{Beginners manual}[url(http://pragma-ade.com/general/manuals/mp-cb-en.pdf\letterhash <http://pragma-ade.com/general/manuals/mp-cb-en.pdf/letterhash> page=58)]
>>> \stoptext
>>> 
>>> Wolfgang
>>>> Hans van der Meer <mailto:havdmeer@ziggo.nl> 18. April 2018 um 21:12
>>>> I have the following question about referencing.
>>>> 
>>>> With \goto{typeset_the_text}[url(file://a_file_location_to_goto <file:///a_file_location_to_goto>.pdf)] I can open a pdf from inside the document that has been typeset. It would, however, be nice if I could further specify on which page of the  pdf to open. Is this possible? Or is this a wish not to be fulfilled?
>>>> 
>>>> dr. Hans van der Meer
>>>> 
>>>> 
>>>> ___________________________________________________________________________________
>>>> If your question is of interest to others as well, please add an entry to the Wiki!
>>>> 
>>>> maillist : ntg-context@ntg.nl <mailto:ntg-context@ntg.nl> / http://www.ntg.nl/mailman/listinfo/ntg-context <http://www.ntg.nl/mailman/listinfo/ntg-context>
>>>> webpage : http://www.pragma-ade.nl <http://www.pragma-ade.nl/> / http://context.aanhet.net <http://context.aanhet.net/>
>>>> archive : https://bitbucket.org/phg/context-mirror/commits/ <https://bitbucket.org/phg/context-mirror/commits/>
>>>> wiki : http://contextgarden.net <http://contextgarden.net/>
>>>> ___________________________________________________________________________________
>>> 
>>> ___________________________________________________________________________________
>>> If your question is of interest to others as well, please add an entry to the Wiki!
>>> 
>>> maillist : ntg-context@ntg.nl <mailto:ntg-context@ntg.nl> / http://www.ntg.nl/mailman/listinfo/ntg-context <http://www.ntg.nl/mailman/listinfo/ntg-context>
>>> webpage  : http://www.pragma-ade.nl <http://www.pragma-ade.nl/> / http://context.aanhet.net <http://context.aanhet.net/>
>>> archive  : https://bitbucket.org/phg/context-mirror/commits/ <https://bitbucket.org/phg/context-mirror/commits/>
>>> wiki     : http://contextgarden.net <http://contextgarden.net/>
>>> ___________________________________________________________________________________
>> 
>> ___________________________________________________________________________________
>> If your question is of interest to others as well, please add an entry to the Wiki!
>> 
>> maillist : ntg-context@ntg.nl <mailto:ntg-context@ntg.nl> / http://www.ntg.nl/mailman/listinfo/ntg-context <http://www.ntg.nl/mailman/listinfo/ntg-context>
>> webpage  : http://www.pragma-ade.nl <http://www.pragma-ade.nl/> / http://context.aanhet.net <http://context.aanhet.net/>
>> archive  : https://bitbucket.org/phg/context-mirror/commits/ <https://bitbucket.org/phg/context-mirror/commits/>
>> wiki     : http://contextgarden.net <http://contextgarden.net/>
>> ___________________________________________________________________________________
> 
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________