No legitimate offline activation process yields error 99 when done correctly with a genuine serial and Adobe-provided response.
If you , try Adobe’s “Find your serial number” tool or check your Adobe account. If you don’t have a valid license CS6 is no longer sold, but using cracked keygens or offline response generators is piracy. Error 99 is a sign that those tools don’t work anymore for CS6 — because modern offline activation checkers have been patched in the last CS6 updates (version 13.0.x). photoshop cs6 offline activation response 99
It sounds like you’re running into (or “response 99”) when trying to offline activate Adobe Photoshop CS6. No legitimate offline activation process yields error 99