Click to expand.If it is a 2007 iMac then you can go up to 10.11.6 (El Capitan). El Capitan is also available from Apple as a free download since you are upgrading from Snow Leopard and can not install Sierra: It may operate a little slower than you like. If that doesn't suit you then you could try Mountain Lion (10.8.5), which can still be purchased from Apple. Let me know if you need the link.
Content tagged with mac osx 10.11.6. This is for both the NPAPI plugin (used by Firefox/Safari) and the PPAPI plugin (used by Opera and other Chromium-based browsers). The Flash Player installers are correctly signed, so this is an issue with your system not correctly identifying the certificate. The reimagined Mac App Store arrives with a new look and exciting new editorial content. Delve into insightful stories, browse curated collections, even watch videos — each designed to help you fine-tune your search for the perfect app. And it’s all organized around the specific things you love to do on your Mac.
Make sure you have a good backup before installing in case it doesn't go well or you don't like it and you want to revert. I would recommend making a clone backup. This is important! The main problem with older browsers is that they don't support TLS v1.2. You need Safari v7 or later (macOS 10.9+). However, there are other browsers that support TLS v1.2. On Snow Leopard you can try: Opera 12.16+ (also ), Firefox v27+, Chrome v30+.
On Leopard (OS X 10.5) the only browser that supports TLS v1.2 is. Some ciphers are missing, but it should work with most sites. Unfortunately, in 2016 they Opera 12 only for Windows, not for Mac. You can test your browser here: So in addition to Firefox and Chrome, you may try Opera 12.16 or Chromium based Opera 26 available at: (open 'desktop' for Chromium based versions or 'mac' folder for 12.16 Presto based versions).
Didn't check the TLS v.1.2 specs of these (edit: Firefox ESR 45 supports TLS v.1.2), but on 10.8. Mountain Lion I run Mozilla Firefox Extended Support Release (ESR) 45.x that will still work and still gets security fixes on 10.6, too. On the release plan I can see at least support until June 2017, though this timeframe for the last release could be extended or not. Some time ago it was announced last release for January 2017 and it was luckily extended!
Info on Download the ESR 45 release on Then I've found, but didn't test: IMHO, Safari is such an old release, that it can't be really considered as a secure browsing option, even on 10.8. Personally, I think that 10.6 is a great OS and I wouldn't update to 10.7 as I can't see a real advantage in doing that. Except you absolutely want to run the iCab Browser on it. Another long term option is to find some actively maintained open source browser that will compile on 10.6 and compile it by yourself. Some starting point could be at As there are projects like Classilla for Classic Mac OS 9 and TenFourFox for Mac OS X on PPC that are both based on Firefox ESR 45 code, there is the hope that ESR 45 will be maintained for a longer period of time or that there will be other projects arising that will somehow maintain browsers for Mac OS X 10.6 and lower.