installationmacqgisupdate
I would like to update QGIS from 2.2 to 2.4 on Mac OS X (10.8) but I cannot find how to do so.
Do I have to uninstall and re-install all from KyngChaos? If so, I would therefore lose the extensions I have added manually.
Nothing is really clear about this on the Net.
Could you uninstall matplotlib and reinstall using the methods outlined at Kyngchaos?
This works well for me on Mavericks. Is there any particular reason you need to do things differently?
As noted by @dakcarto above, it appears that
The KyngChaos install does not support non-system Python installs; so, you will need to install
matplotlibin system Python's site-packages. The best means is to use KyngChaos's installer.
I use both Macos Kyngchaos QGIS and Anaconda Python on my Mac with success.
To do this, you must set your Anaconda Python path in your QGIS variables environment.
Go to QGIS > Preferences > System
In the environment Set PYTHONPATH as a new variable and add /Applications/anaconda2/bin as a value. Set it to overwrite. Restart QGIS, you'll see the new PYTHONPATH variable loaded in the read only section above.
In Anaconda, what I did, you can even create a QGIS specific Python environment with all the necessary libraries inside. You won't need at all to add it to your Macos system paths, unless you are needing it for other applications. But in QGIS you'll have to input /Applications/anaconda2/envs/QGIS/bin instead, as the PYTHONPATH variable.
Then, when you install a new QGIS extension, if a python library is missing for this extension to work properly, just add it to your QGIS Anaconda installation. You won't get any errors anymore.
Best Answer
No problem, you only need to download QGIS 2.4 and install it.
You can upgrade 1) or 2) or 3) or 4) independently. (Mac Os X is an UNIX system)
If you want to keep the old 2.2 version, rename the application, QGIS_2.2.app, for example, otherwise QGIS.app is replaced by the new version.