How to turn off chat history in ChatGPT on Mac: Data Controls steps and limits

Where the history settings live on the Mac app

Chat history controls sit in Settings, under Data Controls. You reach Settings by clicking your name at the bottom left of the ChatGPT window and choosing Settings. If you prefer the keyboard, press ⌘, instead. OpenAI's Commands reference lists ⌘, for opening settings, so it should work from the main window. Both the April 2024 OS X Daily walkthrough and the July 2025 iDownloadBlog steps send you to Data Controls next. That is the screen to check first.

Data Controls is a single screen with a few choices on it. Some guides show a switch for chat history and model training. Others show only a delete option. Menus can change between builds, so read the labels on your screen rather than trusting a screenshot from an old article.

• Your name, bottom left: opens the account area where Settings lives.
• Settings: opens the preferences window. Press ⌘, to open it from the keyboard.
• Data Controls: holds the history, training and deletion options.
• Delete All Chats: clears the sidebar after you click Confirm.

Turn off Chat history & training if you can find it

OS X Daily's April 2024 guide tells you to open Settings, choose Data Controls, then toggle off Chat history & training. It describes the setting as applying to ChatGPT use in OpenAI's apps and on the website. If your app still shows that switch, it is the cleanest answer to this question.

The catch is that the newer Mac guide does not mention it. iDownloadBlog's July 2025 steps stop at Delete All Chats. A 2024 thread in the OpenAI Developer Community also reports the option missing from web settings. The poster said the FAQ was later updated to match the new interface, on May 13, 2024. The layout has changed before, so the old guides may point to the wrong place.

Check your own screen. If you see the switch, turn it off. If you do not, the Mac app may not offer it, and the options below are what you have to work with.

What Delete All Chats really removes

Delete All Chats is the one history step that both Mac guides confirm. Select it, then click Confirm in the pop-up. The sidebar should empty. For most people, that is what turning off history means in practice.

Here is the catch. iDownloadBlog says deleting from the app only removes a running history of your chats from the app itself. It also says your conversations were uploaded to OpenAI's servers, and that ChatGPT may still reference past chats. An empty sidebar tells you what the app shows. It does not tell you what OpenAI keeps.

OS X Daily also quoted an older OpenAI FAQ. It said unsaved chats will be deleted from OpenAI's systems within 30 days. That quote dates from 2024. OpenAI's current Data Controls help pages could not be opened during research, so treat the 30-day figure as an old claim, not a current promise.

A worked example: clearing one work chat

Say you used ChatGPT last week to draft a client email, and you want that one chat gone from the sidebar. Deleting a single chat and deleting all chats are different actions. For the single chat, follow the separate steps in how to delete a chat in ChatGPT on Mac. Use Delete All Chats only when you want the whole list cleared.

The draft itself deserves the same caution. If the text holds client names, figures or contract terms, remove them before you paste it into any chat. A cleared sidebar does not change what was already uploaded, so the safest move is to keep sensitive text out of the chat in the first place.

Use Temporary Chat for one conversation at a time

A 2024 OpenAI developer thread offers Temporary Chat as the workaround when the chat history option is missing. On the web, the toggle sits in the model selector at the top left of the chat window. On the Mac app, the fastest route is the keyboard. Press ⌘⇧N to start a new temporary chat.

OpenAI's Commands reference lists ⌘⇧N for a new temporary chat, and marks it ChatGPT only. Quick Chat is a different action, listed as ⌘⌥N in the same reference. Use temporary chats for one-off questions. Use a normal chat when you want to return to the thread later.

Compare the Mac options side by side

The table is a map, not a promise. Before you rely on any option, check it on your own build. Then read what happens to the chat after you use it.

Mistakes people make when they turn off chat history

• Assuming Delete All Chats erases everything. It clears the sidebar and the running history in the app.
• Hunting for a switch that is not on your screen. Read the labels in Data Controls, then use Temporary Chat.
• Using Quick Chat for private work without testing it. The sources do not say whether its chats stay out of history.
• Trusting a 2024 screenshot. The layout has changed since the older guides were written.
• Forgetting that the sidebar can lag. Deleted chats can stay in Recents, so check after you delete.
• Believing ChatGPT forgets a chat because it left the sidebar. ChatGPT may still reference past chats.

The Recents bug after deleting chats

Since September 2026, some Mac users report that deleted chats stay in the Recents sidebar. The bug thread opened on September 8, 2026. Users reported errors such as Could not load this ChatGPT conversation and Failed to delete conversation. Signing out, quitting and clearing the com.openai.chat cache did not remove the stale entries.

OpenAI said a fix was deployed on September 18, 2026. On September 26, it said the problem was not fully resolved, and it closed the thread without a confirmed fix. Reported workarounds include Quick Chat, deleting the parent project, or a full local data wipe. The wipe is the drastic one, so copy out anything you need first and try the simpler steps before you reach for it.

What changed on the Mac app in 2026

Voice mode left the macOS app on January 15, 2026, according to 9to5Mac. Voice still works on the web, iOS, Android and the Windows app. If your routine depended on talking to ChatGPT on your Mac, plan around that change.

OpenAI's release notes list an October 20, 2026 entry called Introducing locked chats. It describes hiding chats from regular chat history. The same notes say retention and model-improvement settings are unchanged. Hidden is not the same as deleted, so read the setting's own description before you rely on it. The sources do not confirm how it appears in the Mac app.

How to decide what to turn off

If you only want the sidebar clear, use Delete All Chats and accept what it does not remove. If you want sensitive chats kept out of history from now on, start each one with ⌘⇧N. If you want one chat gone, use the single-chat steps instead. If you need a firm answer about retention, read OpenAI's current data controls page, because the sources here are from 2024 and 2025 guides plus OpenAI's developer and release pages.

What to do next

Open Settings, go to Data Controls, and check for the switch. Then decide whether you need Delete All Chats or only a single-chat delete. If you want the single-chat route, read how to delete a chat in ChatGPT on Mac next.

Check the current wording before you rely on it

This page is built from third-party guides, OpenAI's developer reference, and OpenAI's release and community pages. OpenAI's own help pages returned errors during research, so exact menu names may have moved. Before you rely on these steps for client, legal or health data, read OpenAI's current help text for your plan and confirm each step on your screen.