upgrade macbook pro 5,3 ox10.6.8, safari 5.1.10

El Capitan System Requirements

https://support.apple.com/kb/SP728?locale=en_US

Check for application compatibility

Ignore the ads.

http://roaringapps.com/apps

How to upgrade?

http://www.apple.com/osx/how-to-upgrade/

Backup the Mac before upgrading.

Best.

Hi Juanboy:

If you are using OS X 10.6.8 you should be able to upgrade to El Capitan using the App Store.

See this tech note. Upgrade to OS X El Capitan - Apple Support

To upgrade to El Capitan, I would recommend upgrading you RAM to at least 8 GB.

Kim