If you cannot upgrade from Lion, then you are stuck with the version you have.
How to Update Safari on Mac. This wikiHow teaches you how to update Safari and get rid of the 'This version of Safari is no longer supported' messages. If you're using a Mac with OS X 10.5 (Leopard) or older, you must first purchase a copy. Alongside OS X Mountain Lion 10.8, Apple has released the updated version of Safari to OS X Lion (10.7). It is available in OS X Lion's Software Update. According to Apple, the new Safari contains.
Safari 10 7 5 free download - Apple Safari, Guide Safari for Windows 10, Realtek High Definition Audio Codec (Windows 7 / 8/ 8.1/ 10 64-bit), and many more programs.
Upgrading to Yosemite
You can upgrade to Yosemite from Lion or directly from Snow Leopard. Yosemite can be downloaded from the Mac App Store for FREE.
Upgrading to Yosemite
To upgrade to Yosemite you must have Snow Leopard 10.6.8 or Lion installed. Download Yosemite from the App Store. Sign in using your Apple ID. Yosemite is free. The file is quite large, over 5 GBs, so allow some time to download. It would be preferable to use Ethernet because it is nearly four times faster than wireless.
Macs that can be upgraded to OS X Yosemite
1. iMac (Mid 2007 or newer) - Model Identifier 7,1 or later
2. MacBook (Late 2008 Aluminum, or Early 2009 or newer) - Model Identifier 5,1 or later
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3. MacBook Pro (Mid/Late 2007 or newer) - Model Identifier 3,1 or later
4. MacBook Air (Late 2008 or newer) - Model Identifier 2,1 or later
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5. Mac mini (Early 2009 or newer) - Model Identifier 3,1 or later
6. Mac Pro (Early 2008 or newer) - Model Identifier 3,1 or later
7. Xserve (Early 2009) - Model Identifier 3,1 or later
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Upgrade Safari For Mac 10.5.8
To find the model identifier open System Profiler in the Utilities folder. It's displayed in the panel on the right.
Are my applications compatible?
Mac Os X 10.7.5 Upgrade
See App Compatibility Table - RoaringApps.