Yep for those of you that have a hardmod and want to downgrade their 11.0 3DS and being stuck with either OSX or Linux developer dx3m has come to rescue and brought you guys an autofirm patcher for both OSX and Linux. If you don’t know what autofirm patcher is you can read about the whole procedure here.
https://twitter.com/dx4m/status/751532501257097216
https://twitter.com/dx4m/status/751912721822679040
Download links: OSX Version, Linux Version
Thanks to dx3m for porting this tonOSX and Linux ^^
Source: dx3m