Important Notice: We're experiencing email notification issues. If you've posted a question in the community forums recently, please check your profile manually for responses while we're working to fix this.

On Monday the 3rd of March, around 5pm UTC (9am PT) users may experience a brief period of downtime while one of our underlying services is under maintenance.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

FF 4.0 download says "not compatible" w/my system. (iMac pwr pc G5) What's going on? Do I need to revert back to FF 3.xxx. If so, where do I find old FF browser?

  • 1 பதிலளி
  • 4 இந்த பிரச்னைகள் உள்ளது
  • 2 views
  • Last reply by TonyE

Downloaded & installed FF 4.0 on iMac Power PC G5 (2Ghz - 1.5 GB RAM). When opening new FF, error message states "not compatible with this system". Had been running older 3.xx.xx with no problems. (Just wanted to upgrade to the 'latest & greatest'. I have loaded 4.0 onto my MacBook w/intel processor - no problems. Is 4.0 not backwards compatible with pre-intel processors?

Downloaded & installed FF 4.0 on iMac Power PC G5 (2Ghz - 1.5 GB RAM). When opening new FF, error message states "not compatible with this system". Had been running older 3.xx.xx with no problems. (Just wanted to upgrade to the 'latest & greatest'. I have loaded 4.0 onto my MacBook w/intel processor - no problems. Is 4.0 not backwards compatible with pre-intel processors?

All Replies (1)

Firefox 4 requires at least OS X 10.5 and an Intel Mac. There is a third party version of Firefox 4 that runs on OS X 10.4/10.5 and PPC Macs, for details see http://www.floodgap.com/software/tenfourfox

If you prefer, you can get the latest version of Firefox 3.6 from http://www.mozilla.com/en-US/firefox/all-older.html