A couple of OS versions ago, Apple stopped including a Secure Empty Trash option, I believe because of the adoption of SSD drives. On my older MB Pro with magnetic hard drive, I used File Shredder to accomplish this. I recently upgraded to a new MB Pro with SSD drive and have done some reading about this but it's all a bit over my head - it may not be possible to overwrite all of a file due to location ambiguity, there's a life cycle issue with too many overwrites, etc. So I just wanted to ask whether there is an app to use on the new MB Pro that could be used sparingly to securely erase a file or at least most of the file in the case of highly sensitive content. I only keep such content temporarily on the laptop, so wasn't considering File Vault.