A desktop WhatsApp for Mac that shares one window with your work

Searching for desktop WhatsApp on a Mac usually starts with a small annoyance. Messages keep arriving on a phone that is face down on the desk, and picking it up costs more attention than the message is worth. The official Mac app fixes that part in about two minutes. What it does not fix is everything that shows up afterward: a second WhatsApp number that will not load, a dock that now holds one more icon, and a chat window that sits apart from Slack, Gmail, and every other place the same conversation continues. This is a look at what the Mac app actually provides, where its limits are written down, and what to do about the parts it was never designed to solve.

What the official Mac app is, in plain terms

WhatsApp publishes a native Mac application. It is not a wrapper around the web page, and the help center lists what it adds over a browser tab: voice and video calls with up to 32 people, screen sharing during a video call, call links that can be created and shared ahead of time, the ability to join a group call after it has already started, and drag and drop for files and media straight into a chat.

Two items on that list matter more than the rest for daily use. The first is that notifications and messages arrive even when the phone is offline. The second is access to up to three years of message history on the desktop. Older setups required the phone to be awake and connected for anything to appear on a computer, and that constraint is gone.

The app is free and comes from two places: the WhatsApp download page or the Apple App Store. There is no separate account to create. The Mac app attaches to an existing WhatsApp account on a phone, which is the detail that shapes every limitation further down this page.

One requirement rules out a slice of older hardware immediately. The help center states plainly that WhatsApp for Mac is supported on macOS 12.1 or newer versions, and that anyone on an older release needs to update macOS first or use WhatsApp Web in a browser instead. On a Mac that can no longer take a newer macOS, the browser is not a workaround. It is the only path.

The four device limit, and the 30 day rule nobody reads

A Mac running WhatsApp is a linked device. WhatsApp allows up to four devices linked at a time to a primary phone, and the primary phone is still required to register the account and to link anything new.

Four sounds generous until the list gets counted honestly. A work MacBook, a personal iMac, an iPad, and a browser session on a machine at a client site fills the allowance with nothing left over. Each browser used for WhatsApp Web occupies a slot the same way a native app does.

The rule that catches people later is the timeout. Linked devices are automatically disconnected after 30 days of inactivity. A laptop left in a drawer over a long project comes back needing a fresh QR scan, and the phone has to be present to do it. That is fine at a desk and irritating in an airport.

There is also a disclosed defect worth knowing before assuming something is broken locally. WhatsApp's own linked devices page carries a notice that some linked devices are not displaying up to one year of chat history, with the full history still visible on the primary phone. If a chat looks shorter on the Mac than on the handset, that is a known issue rather than a setting to hunt for.

Two WhatsApp accounts on one Mac is not currently possible

This is the wall that sends most people looking for alternatives, so it is worth stating exactly as the documentation does.

WhatsApp does support multiple accounts. A single mobile device can hold two accounts, each with its own phone number, its own profile picture, its own notification settings, and its own privacy settings. The idle account still raises alerts for messages and calls, and switching brings its content forward.

The restriction is where that feature is available. Secondary accounts can only be created from a primary mobile device. Only mobile companion devices can switch between accounts. The help center states that the feature is not available on linked devices and that multiple accounts are currently supported on mobile devices only.

A Mac is a linked device. So a personal number and a business number cannot both sit on the same Mac through the official app, no matter how the linking is arranged. The practical options are narrow:

• Keep one number on the Mac app and handle the second number on the phone.
• Put the second number in a browser as WhatsApp Web, in a browser profile or container that holds a separate session from the first.
• Use the WhatsApp Business app on the phone for the business number, accepting that account switching is not offered there either.

The second option is the one that scales, and it is the reason the question usually turns into a browser question rather than an app question.

Mac app or browser, compared on what actually differs

Both are linked devices. Both consume one of the four slots. The differences are narrower than the download pages suggest.

	WhatsApp for Mac	WhatsApp Web
Installation	Download page or Mac App Store	None, opens at web.whatsapp.com
macOS floor	macOS 12.1 or newer	Whatever the browser runs on
Calls	Voice and video with up to 32 people	Calling to contacts over the internet connection
Screen sharing	Listed as a benefit of the Mac app	Not listed on the WhatsApp Web page
Message history	Up to three years stated for the Mac app	Not stated
Second account on the same machine	Not possible, single linked session	Possible with separate browser sessions
Linking	QR scan or phone number	QR scan from the phone

The last row is the one that decides the choice for a lot of people. A native app holds exactly one session because the operating system gives it one storage area. A browser can hold as many sessions as it has isolated storage areas, which is why browser profiles keep coming up as an answer to a messaging question.

Linking the Mac, and the checks worth doing once

Linking is short. A new device can be added by scanning a WhatsApp QR code or by using the phone number, and the phone has to be in hand for either route. On the phone, the list of everything currently attached sits under Linked devices, and a device can be logged out from that same list.

Three things on WhatsApp's own security guidance are worth doing on the day the Mac is linked rather than after something looks wrong.

The first is to keep push notifications enabled on the phone. WhatsApp uses them to announce new links, which is how an unrecognised device gets noticed and removed quickly. Turning phone notifications off to stop duplicate alerts once the Mac is running removes that warning as well.

The second is to link only from official surfaces. WhatsApp names them: WhatsApp Web, the Windows and Mac apps, Android tablets, companion phones, and AI glasses. The guidance goes further and states that linking through unofficial apps or websites may put the account at risk, because those are third party builds WhatsApp cannot validate. Anything promising two accounts on one desktop through a downloaded client is worth treating with that sentence in mind.

The third is to read the Linked devices list every so often. Four slots is a small number, and stale entries are the usual reason a new link appears to fail. Logging out a device that is no longer used takes one tap and returns the slot immediately.

The real problem is window count, not app count

Installing the Mac app trades one annoyance for another. The phone stops interrupting, and instead there is a standalone window that has to be found, raised, and dismissed, competing with a browser that already holds Gmail, a project tool, and a handful of tabs that never close.

Consider what a single support thread looks like in practice. A customer writes on WhatsApp. The order sits in an admin panel in a browser tab. The internal discussion happens in Slack. The fix is written up in a shared document. Four surfaces, one task, and three different ways to switch between them. The switching cost is not the seconds spent. It is the moment of reorientation on arrival, repeated dozens of times a day.

This is what a browser that keeps each web app in its own window is built to address. Instead of one tab strip holding everything and one separate native app sitting outside it, each service gets a window with its own session and its own place, and a group of related services can be switched to as a set. The organising idea behind that layout is described on the Workspaces page, and the routing behaviour that sends a link to the app and account it belongs to is covered under Features.

The session isolation is also what resolves the two number problem. If each app in a workspace runs in its own cookie container, two WhatsApp Web sessions can stay signed in at once without private windows or separate browser profiles, the same way two Gmail accounts or two Slack workspaces can. Both still count against the four linked device allowance, so the limit does not disappear. It just stops requiring a logout every time the other number needs attention.

What this costs in attention, and what it does not

None of this removes the need to decide when to look at messages. A chat client on a large screen with notification permissions granted is more interruptive than a phone in a bag, not less.

Two settings are worth adjusting on day one. The Mac app offers a choice to receive call notifications even when the app is closed, which is useful for a work number and unhelpful for a personal one. Per app volume and zoom settings, available in browsers built around separated apps, let a noisy service be muted without muting everything.

The honest framing is this. The Mac app solves reachability. Window organisation solves placement. Neither one solves the decision about when a message deserves a response, and treating a tool as though it will is how people end up trying a fourth one.

What to change first

Install the official Mac app if the machine runs macOS 12.1 or newer and only one WhatsApp number is in play, because it is free and takes minutes. If a second number is involved, or if WhatsApp is the fourth or fifth surface already open for the same piece of work, the change that pays off is where the windows live rather than which chat client is used, which is the problem SpaceDeck was built around.