Permission Denied when modifying config.txt

[wontwa]

I'm attempting to change the rotation of the display by modifying the config.txt file in the Boot folder, but I keep getting Permission Denied when attempting to modify it. I'm using FIleZilla to SFTP the connection, I'm navigating and right clicking on the config.txt file, selecting "View/Edit", having it open with the default system editor (TextEdit on a Mac), then selecting Save. At this point it asks if I'd like to delete the temp file that I'm working on and overwrite the config.txt file, which I say Yes to....then - Permission Denied. Does anyone have any insight into this or can walk me through it?

This is the final step to me having this running properly - any help would be greatly appreciated!

Thanks!

[wontwa]

I ultimately discovered that I could pull the Micro-SD card, put it in my laptop, and edit the config.txt file from there.