If you are looking for an android firmware flashing tool like ODIN for Linux or MAC, free cross-platform utility Heimdall is the answer. While Odin is a leaked internal Samsung software, Heimdall is an open-source, cross-platform tool suite to flash ROM's onto Samsung Galaxy S devices - Heimdall uses the same protocol as Odin but is easier to use and supports cross-platform operation.

Here is an step-by-step illustrated tutorial on how to flash the latest Heimdall stock firmware packages for GT-I9000 (2.3.5, XXJVT) on Samsung Galaxy S I9000.

1. Download and install Heimdall for your desktop operating system (Windows, Linux or MAC).
2. Download the Heimdall Google Android ROM v 2.3.5 XXJVT and save on your computer.
3. Launch Heimdall and click "Browse" and select the XXJVT_Heimdall.tar.gz file downloaded in previous step, Heimdall will extract the archive.


4. If the archive is ok, Heimdall will display the contents as below.

5. Switch off your Samsung Galaxy S I9000 and make sure you are into the download mode (When completely turned off, press and hold the Volume Down + Home + Power buttons simultaneously and you should see a screen with a big yellow triangle and the Android robot working on construction on your phone screen), make sure Heimdall has detected the device in "Download Mode".

6. Goto the "Flash Tab" and Click "Start" to initiate the flashing process. (Be cautious flashing may brick your device)

7. Let the process complete and you now have a successfully flashed phone with latest Android software.