From the team-xecuter website:-
'I still recommend staying on 8.1.0 or lower for now. There are problems with using the 2.9 boot.dat and ChoiDujourNX. But if you MUST update to 9.0.0. Then you will need to use the 2.8 boot.dat instead, and use ChoiDujourNX v1.0.2 to update. After it's complete, then you can put the 2.9 boot.dat on the SD card.
We are also releasing a firmware package with SX installer tomorrow if you would rather wait until then.
Apologies for the inconvenience!'
Before I found this announcement, I bought the sx os from flashcarda.com, and test it on my Nintendo Switch 9.0.0 but get the black screen, ... now I need to downgrade to 8.1.0
SX OS 2.9 can not work on Nintendo Switch 9.0.0
Re: SX OS 2.9 can not work on Nintendo Switch 9.0.0
I have switch (day one edition) 9.0.1 with SXOS BETA 2.9.2 and it's work fine I make upgrade yesterday.