Enable Atmosphere's incognito feature

In most cases (if you are running vanilla Atmosphere), you don't need to use Incognito_RCM at all. The incognito feature is now built-in with Atmosphere - below shows how to enable it.

There are still some cases where Incognito_RCM is useful, but it is a brute-force method intended for users who know what they are doing!

Enable incognito-mode in Atmosphere

In your Atmosphere installation on your SD card, copy the file exosphere.ini from SD:/atmosphere/config_templates to the root of your SD card.

Open the file in your preferred text editor and amend the values for blank_prodinfo_emummc and blank_prodinfo_sysmmc from 0 to 1.

The final section in the file should look like this;

[exosphere]
debugmode=1
debugmode_user=0
disable_user_exception_handlers=0
enable_user_pmu_access=0
blank_prodinfo_sysmmc=1
blank_prodinfo_emummc=1
allow_writing_to_cal_sysmmc=0

You can confirm that it is working by checking the serial number in the settings!