Is there a Google Chrome version 50 supporting Mac OS 10.8.5?
At the present time the latest version of Google Chrome is: 50.0.2661.94


Under OS X Mountain Lion 10.8.5...


If you do not have Google Chrome installed, and you download a copy and install it, the version will show as: 49.0.2623.112

If you then try to update it through Google Chrome it will report: "Google Chrome is up to date."


Note that the downloaded googlechrome.dmg file's URL is: 


&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;https://dl.google.com/dl/chrome/mac/legacy/GGRO/googlechrome.dmg

If you have an earlier version installed, e.g. 48.0.2564.109, and update it through Google Chrome it will report: "Google Chrome is up to date."


On later versions of OS X, the downloaded googlechrome.dmg file's URL is: 


&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;https://dl.google.com/chrome/mac/stable/CHFA/googlechrome.dmg


At the present time that googlechrome.dmg file contains version: 50.0.2661.94


To get the latest version of Google Chrome on OS X Mountain Lion 10.8.x, do the following:


Download the googlechrome.dmg file from the link directly above,
not the one that has "legacy" in its URL.
If open, close Google Chrome and delete it from the Applications
folder.
Open the newly downloaded googlechrome.dmg file and in spite of
the international no symbol showing, drag and drop it into the
Applications folder, not the Applications link in the installer
.dmg file.
Open Terminal and use the following command to modify the
Info.plist file inside the Google Chrome application bundle:

defaults write /Applications/Google\ Chrome.app/Contents/Info.plist LSMinimumSystemVersion 10.8.0



&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Note: Copy and paste the entire command above into the Terminal and then press Enter.


Now select the Google Chrome application bundle in the Applications
folder and press Command-I to open its Get
Info sheet and then close the Get Info sheet.
In a Terminal run the following command: killall Finder


&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Google Chrome application icon should now show as normal.

Now you can run the latest Google Chrome on OS X Mountain Lion 10.8.x.


Note: While the current latest version of Google Chrome (50.0.2661.94) is running fine for me under OS X Mountain Lion
10.8.5, this does't mean that future versions will run without issue on OS X Mountain Lion 10.8.5, and therefore this method will become
worthless.