The World Champions are 2-1 up in the inaugural series, having won the last two Tests in Cape Town and Soweto. Now, the RGR circus heads to Baltimore for the final match on Saturday.
"Over these past weeks, we once again demonstrated the true spirit of our nation," he wrote on Monday.
"With guests travelling from all corners of the world to experience this historic event, you showed them the warmth, generosity and unity that define us as a people.
"Your embrace of our visitors reflected the essence of Ubuntu, 'I am because we are'. You reminded the world that South Africa is strongest when we stand together, support one another and welcome others with dignity and pride.
"The economic impact of this series will benefit communities across our country, contributing to livelihoods and strengthening the broader national economy. As an organisation, we listened carefully to your comments and recommendations on how we can improve future events.
"We value your voice and we will implement these insights to ensure that every edition of this series continues to grow in excellence.
"Our players draw immense strength from your unwavering support. Your passion, your presence and your belief in them fuel their performance and deepen their pride in representing our nation.
"Thank you, South Africa, for once again showing the world who we are, united, resilient and guided by the spirit of Ubuntu."
Dave Rennie has conceded that referee Nika Amashukeli was consistent in showing Ruben Love a yellow card in the third Rugby's Greatest Rivalry Test match against the Springboks.
Springbok coach Rassie Erasmus admitted he was sweating after a slew of injuries threatened to derail their bumper season.
Springbok No. 8 Jasper Wiese revealed that they are fully focused on their clash with the All Blacks despite the enormity of the occasion in Baltimore.
John Smit believes Malcolm Marx has established himself as the greatest hooker ever to represent the Springboks.
