Firefox 3.6.28 is the last version of Firefox that works with Mac OS X 10.4 or PowerPC processors. To keep your computer and personal information safe, we recommend that you upgrade to Mac OS X 10.7 and install the latest Firefox if possible. This article covers your upgrade options. {for win,linux} {note}'''Note:''' This article only applies to Mac OS X.{/note} {/for} __TOC__ =Intel Processors= If you have an Intel processor and Mac OS X 10.4, your best option (secure and easy) is to upgrade Mac OS X. There is some cost involved with that so we've included some other options: ==Option 1: Upgrade Mac OS X== You should upgrade to the latest Mac OS X (10.6 or 10.7). This is the most secure option and will allow you to run the latest and greatest Firefox. *[http://www.apple.com/macosx/ Learn more at Apple's website]. {note}'''Note:''' [https://en.wikipedia.org/wiki/Mac_OS_X_Snow_Leopard#System_requirements Some Intel based Macs] can only update to [http://store.apple.com/us/product/MC573Z/A Mac OS X 10.6].{/note} ==Option 2: Continue using Firefox 3.6== If you can't upgrade Mac OS X, you can continue using Firefox 3.6. {warning}'''Warning:''' You will be using unsupported software on an unsupported operating system which poses a significant security risk.{/warning} =PowerPC Processors= If you have a PowerPC processor you won't be able to upgrade MacOS X. For most people the best option will be to switch to a newer computer. There is some cost involved with that so we've included some other options: ==Option 1: Switch to a Mac with an Intel processor== Although getting a newer computer can involve significant cost, a newer Mac will provide a much better experience and allow you to keep Firefox and Mac OS X updated and secure. ==Option 2: Continue using Firefox 3.6== If you can't replace your computer, you can continue using Firefox 3.6.{warning}'''Warning:''' You will be using unsupported software on an unsupported operating system which poses a significant security risk.{/warning}

Firefox 3.6.28 is the last version of Firefox that works with Mac OS X 10.4 or PowerPC processors. To keep your computer and personal information safe, we recommend that you upgrade to Mac OS X 10.7 and install the latest Firefox if possible. This article covers your upgrade options.

Intel Processors

If you have an Intel processor and Mac OS X 10.4, your best option (secure and easy) is to upgrade Mac OS X. There is some cost involved with that so we've included some other options:

Option 1: Upgrade Mac OS X

You should upgrade to the latest Mac OS X (10.6 or 10.7). This is the most secure option and will allow you to run the latest and greatest Firefox.

• Learn more at Apple's website.

Option 2: Continue using Firefox 3.6

If you can't upgrade Mac OS X, you can continue using Firefox 3.6.

PowerPC Processors

If you have a PowerPC processor you won't be able to upgrade MacOS X. For most people the best option will be to switch to a newer computer. There is some cost involved with that so we've included some other options:

Option 1: Switch to a Mac with an Intel processor

Although getting a newer computer can involve significant cost, a newer Mac will provide a much better experience and allow you to keep Firefox and Mac OS X updated and secure.

Option 2: Continue using Firefox 3.6

If you can't replace your computer, you can continue using Firefox 3.6.