Well, I build the OS X package.  I recently upgraded to Sierra and it messed up 
my development setup.  I had problems with QGIS also, but didn't want to spend 
time figuring it out (I need to build for older systems, and I was way behind 
on QGIS updates) so I used my other Mac that I kept at Yosemite.

- installing Qt4 - I had already installed Qt4 so running the installer was not 
a problem.  But what I have is a standard OS X installer package for Qt4, that 
should not crash anyways.  BUT, it installs a couple important items in 
/usr/lib and /usr/bin, which are protected in Sierra by SIP and will fail.  
You'd have to hack those bits so they are available elsewhere in an unprotected 
location.  You can use Pacifist to extract installer files so you can put them 
in custom locations.

- compiling Qt4 - I never had much luck with this in the past, even in 
supported OS X versions, but it's long past supported OS X versions and you 
will at least get lots of warnings, if not errors.  Maybe homebrew and the like 
have patches to work around these, but sounds like you still had problems.


> On May 29, 2017, at 9:33 AM, Helton Costa <heltuco...@hotmail.com> wrote:
> 
> Hi everybody,
> 
> This is my first post here and I hope there's not already a post related to 
> this, even thought I searched through the list a little.
> 
> I have been trying to build QGIS 2.18 for about 3 weeks following a few step 
> by steps I found but none of them gave me success. I'm on OSX 10.12.
> I first followed the official step by step from QGIS, and then, other ones 
> using homebrew, but wasn't able to finish the build for the intended version.
> I do believe I have a polluted OS and libraries, but I invested around 6 
> hours cleaning it and my environments to try it all again, and still, no 
> success.
> 
> Mainly, I believe my issue is regarding Qt4, which is already deprecated and 
> I'm not able to install it properly. I already tried the .dmg from official's 
> qt website (which crashes) and some cartr and osgeo formulaes from homebrew 
> and still no success.
> Somewhere along the configuration and build process I get errors regarding 
> Qt4 or some of their python bindings libraries and even thought I did manage 
> to fix some of them, the build was never able to finish.
> 
> Do you guys believe it is still possible to build non-master versions of QGIS 
> on OSX, and if so, what would be some kind of different approach in order to 
> be able to achieve it?
> 
> Kind regards, 
> 
> Helton Costa
> 
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William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
http://www.kyngchaos.com/

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- revised entry in the HitchHiker's Guide to the Galaxy


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