How can I write to Apple technical support?

Use the Get Support link in the upper right of this webpage. Or maybe the @AppleSupport Twitter account. Or call Apple. Or send a letter to the Apple corporate contact address linked in the webpage footer. Apple doesn’t publish a general email address, if that’s what you’re after.

Or you post the question here, and maybe somebody can answer it.

Use the "get support" link to contact Apple. Or, post your question to these forums and fellow users may be able to help you.