Mass Effect 3 - How to Save the Geth and Quarians with Peace (STEP-BY-STEP GUIDE)

In this video I'll show you how to achieve peace between the Geth and Quarians in Mass Effect 3.
This info comes from the Mass Effect Fandom wiki and has been confirmed by my own experience on three separate playthroughs.
MASS EFFECT 2 - HOW TO SAVE EVERYONE DURING FINAL MISSION
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Mass Effect - Priority Rannoch Fandom wiki page
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The requirements to secure peace between the Geth and Quarians in Mass Effect 3 are among the most complicated in the entire ME Trilogy.
In order to save both the Geth and Quarians, you must meet ALL of the following basic requirements:
1) You must import a save file from ME 2 (including the following outcomes in #2 & 3)
2) Tali must not be exiled in ME2
3) You must activate Legion in ME2
4) Tali and Legion must survive the final mission of the game
5) Shepard must have at least 4 bars of reputation score in ME3
6) You must complete the quest Rannoch: Geth Fighter Squadrons
ALSO, you need to score at least 5 points from the list below, which I refer to as the "Peace Scoreboard." If you have less than 5 points then peace will not be possible:
1) ME2 - If Tali is exonerated at her trial and not exiled (+2 points)
2) ME2 - Destroy Geth heretics during Legion: A House Divided (+2 points)
3) ME2 - Resolve confrontation between Tali and Legion without choosing a side (requires renegade or paragon speech check) (+1 point)
4) ME3 - Rescue Admiral Koris on Rannoch, NOT his crew (+1 point)
5) ME3 - Complete Rannoch: Geth Fighter Squadrons (+1 point)
If you meet all of the requirements listed above then peace will be possible at the end of Priority Rannoch. After Shepard defeats the Reaper, the Geth are no longer under the sway of the Old Machines.
Admiral Gerrel seizes the opportunity to launch an attack on the now defenseless Geth fleet. Legion protests and asks Shepard’s permission to upload the Reaper code that will make the Geth fully sentient and allow them to defend themselves. Tali begs Shepard not to allow this, saying that the Quarians will be destroyed if the Geth are reactivated.
You need to allow Legion to proceed with the upload of the Reaper code, and convince Admiral Gerrel to call off his attack with either a Renegade ("Warn the fleet") or Paragon ("Rally the fleet") speech option.
If you've done everything correctly, he will stop his attack and both the Geth and Quarians will survive the events of Priority Rannoch. You will gain both the Geth and Quarian fleets as war assets, which is essential if you want to get the best ending without playing multiplayer. You'll also get to continue having Tali as a squadmate on the Normandy.
Have any questions, let me know in the comments below.