According to the Apple Font License Agreement, these fonts are meant for creating mockups and designing apps for Apple platforms, not for general distribution or non-Apple projects [1].
Navigate directly to the Apple Developer Fonts page [1]. Download sfregular zip
To download the (San Francisco), you will need to access it through the official Apple developer portal, as it is a proprietary font designed for Apple platforms. According to the Apple Font License Agreement, these
Click the "Download" button to download the font suite (usually a .dmg file, which contains the .ttf or .otf files). Download sfregular zip
Open the downloaded file, locate the "SF Pro" or "SF Compact" folder, and install the Regular font variant on your system [1].