How to rewrite a casual text message into a formal email to a client on Mac

You just wrote the perfect text to a friend explaining why a project is late. Short, honest, a little blunt. Then you realize the same words need to go to a client, in an email, in about two minutes.

Copying that text straight into an email rarely works. What sounds fine between friends can sound careless in a client's inbox, even when the facts are identical.

Here is how to turn a casual text into a formal client email on a Mac, without retyping the whole thing from scratch.

To rewrite a casual text into a formal client email on a Mac:

1. Paste or type the casual message into your email draft.
2. Highlight the text.
3. Trigger a rewrite with a hotkey or from the menu bar.
4. Review the formal version in a diff, then apply it or ask for another pass.

That loop keeps you in your email client the whole time. On macOS, WordPolish runs it inside any app, including Mail, Gmail in a browser tab, or Outlook.

Texting and emailing a client are not just two formats. They are two different registers, the term linguists use for how language shifts based on who you are talking to and why.

Registers vary because the language is used for different purposes, in different contexts and for different audiences. (Cambridge Dictionary, Register)

A text to a friend sits in the casual register: short fragments, contractions, no greeting, no sign-off. None of that is sloppy. It is just tuned for a relationship with no distance and no formality to manage. Linguist David Crystal has spent years studying texting and found that even its heavy use of abbreviation is more deliberate and less chaotic than people assume.

Typically less than 10 percent of the words in text messages are actually abbreviated in any way. (David Crystal, interviewed in Vocabulary.com)

A client email sits in a different register entirely. There is a working relationship to maintain, and often a paper trail that outlives the conversation. The same short, blunt sentence that reads as efficient in a text can read as curt or unprofessional once it shows up in an inbox with a subject line and a signature underneath it.

The fix is not to write more. It is to shift register: add the structure a client expects, and drop the shorthand that only makes sense between friends.

The default move is to open a chat tool in a new tab, paste the text, ask for a "formal version," copy the result, switch back to your email, and paste it in. It works, but it costs more than the thirty seconds it looks like on paper.

Every one of those switches has a real cost, one researchers have measured directly.

Even brief mental blocks created by shifting between tasks can cost as much as 40 percent of someone's productive time. (American Psychological Association, Multitasking: Switching costs)

That cost is why so many texts get forwarded as-is, typos and all, or rewritten by hand in a rush that introduces new typos. The rewrite is not hard. Leaving your email to go do it somewhere else is what makes people skip it.

The better path keeps the rewrite inside the window you are already in.

With WordPolish on macOS:

1. Highlight: Select the casual text once it is pasted into your email draft.
2. Trigger: Press the hotkey, or open WordPolish from the menu bar.
3. Review: A diff overlay shows the formal rewrite next to your original.
4. Apply: Accept it, undo it, or ask for another pass if the tone still feels off.

There is no prompt to write and no separate app to paste into. The rewrite uses the text you selected and the context around it, so it stays close to what you actually meant instead of inventing new details or padding the message with filler.

Formal does not mean stiff, and it does not mean longer. A good client email is clearer than a text, not more elaborate. A few traits do most of the work.

A formal client email usually includes:

• A greeting: Open with the client's name rather than jumping straight into the message.
• The point up front: State what you need or what happened in the first sentence or two, before any background.
• Full sentences: Spell out contractions and drop text-only shorthand like abbreviations or emoji.
• A sign-off: Close with your name, so the email reads as a complete message rather than a fragment.

That second point, putting the point up front, has a name in professional writing circles: BLUF, or Bottom Line Up Front.

The BLUF should quickly answer the five W's: who, what, where, when, and why. (Kabir Sehgal, How to Write Email with Military Precision, Harvard Business Review)

A client reading your email wants to know what changed and what happens next before they want the backstory. The formal version of a text should lead with that, then fill in detail underneath.

Here is a text a freelancer might send a friend about a delayed project.

Before:

hey so bad news, the site's gonna be late. dev messed up the checkout flow and i gotta redo it. probably 3-4 more days, sorry!! will keep you posted

Same facts, shifted into a formal client register.

After:

Hi Jamie,

I want to flag a delay on the site launch. During testing, we found an issue in the checkout flow that needs to be rebuilt properly rather than patched. I expect this to add three to four days to the timeline.

I will keep you updated as we make progress, and I am confident the extra time will result in a more reliable checkout for your customers.

Best,
Alex

Nothing was added that was not already in the text. The greeting, the up-front summary, the full sentences, and the sign-off are what turn a quick update into something a client can forward to their own team without a second look.

WordPolish reads your highlighted selection and the surrounding text through the macOS Accessibility API, the same system-level interface that assistive tools use to see and act on on-screen content.

The Accessibility API exposes UI elements to assistive apps and other clients. (Apple Developer Documentation)

Because the rewrite happens at that system level, it does not matter whether your email lives in Apple Mail, Gmail inside Safari, or Outlook. WordPolish sees the text the same way, rewrites it, and places the result back where you were typing.

A casual text and a formal client email carry the same facts in two different registers, and the gap between them is smaller than it feels when you are staring at a blank email. The friction is not the rewrite itself. It is the trip to another app to do it.

Highlight the text, trigger a rewrite, review the diff, apply it, all without leaving your email. That is the loop WordPolish is built for on macOS.