How to Translate Text Offline on Mac with Transnap
Prepare offline language packs on macOS 15 or later, translate clipboard text from the menu bar and revisit translation history stored on your Mac.
Check your Mac and language pair
Transnap requires macOS 15 or later and uses native macOS translation. Check that your source and target languages are available in the app. Do not assume every language pair works offline.
Download language packs while online
View and download the offline language packs you need in Transnap. Wait for downloads to finish before going offline. If preparation fails, check your connection and the language options offered by the system.
Copy text and open the menu bar panel
Copy a harmless test sentence and open Transnap from the menu bar. The panel reads the latest clipboard text and translates it. You can also type text manually and press Return.
Test your language pair without a connection
After downloading, temporarily disconnect from the internet and translate a fresh sentence. Verify the language pair you plan to use before relying on it during travel or other offline work. Reconnect when your test is complete.
Revisit history on your Mac
Translation history stays on your Mac and can be revisited or copied. For unexpected results, check the detected source language, target language and original text. Verify important specialist terms separately.
Match the tool to the task
This workflow is for text translation. It does not establish support for whole-page website translation, image OCR or video subtitles. Choose a tool based on the specific task you need to complete.
Use it while reading
Copy one or two sentences with enough context, read the translation and return to the original. Split long passages at natural boundaries. Keep the original wording of unfamiliar names or terms for later checking; isolated words may lose their context.
If no translation appears
Retry with a plain short sentence, confirm the clipboard contains text and check both languages. When offline, confirm the required downloads are complete. After changing language pairs, reconnect to finish preparation and test offline again.