Frequently asked questions

Parallel Spaces is a macOS app that runs multiple, fully isolated copies of the apps you already use. Each copy — we call it a space — keeps its own private storage, so you can stay signed into two or more accounts of the same app at the same time.

Anyone who juggles more than one account: work and personal, multiple clients, separate social media profiles, family members sharing one Mac, or developers and QA testers who need a clean second account.

Logging out closes one account before you can use the other. Parallel Spaces runs them at the same time, in separate windows, each fully signed in. No switching, no losing your place.

Parallel Spaces is available on the Mac App Store. See the App Store listing for current pricing and the exact macOS version required.

There's no built-in limit. Practically, the cap is your Mac's disk space — each space stores its own data — and how many real-world accounts you actually need.

Most messaging clients, Chromium-based browsers, Electron apps and many native Mac apps. You can also turn any website into its own app. Parallel Spaces detects how each app stores its data and isolates the second copy correctly.

Create a second WhatsApp space in Parallel Spaces. It launches an isolated copy of the WhatsApp desktop app (or WhatsApp Web as a web app space) with its own storage, so you can keep a personal and a business number signed in at the same time, side by side. Repeat for a third or fourth account if you need it.

Yes. Make a Telegram space and Parallel Spaces opens a separate, isolated instance of Telegram with its own login. Run two Telegram accounts (or more) in their own windows, each with separate chats and notifications — no logging out to switch.

Yes. Create one Slack space per company or client. Each runs as its own isolated copy of Slack, signed into its own workspace, so you never have to log out of one to reach another.

In most cases, yes. Apps that normally allow only one running copy — like Viber, Signal and Discord — can run as multiple isolated instances inside Parallel Spaces, so two accounts stay signed in together. A small number of apps are blocked by macOS sandboxing from launching twice; those stay single-instance.

Each space gets its own private data directory. Parallel Spaces points the new copy at that directory, so its logins, cookies, history and settings are completely separate from every other space and from the original app.

Sandboxing is a macOS security feature. A sandboxed app is walled off from the rest of your Mac — it can only read and write its own private folders, and it can only do things you explicitly allow (like picking a file). Apple requires every app on the Mac App Store to be sandboxed, including Parallel Spaces itself.

It's great for security. The downside: the same sandbox sometimes blocks an app from launching a second copy of itself. When that happens, no third-party app — Parallel Spaces included — can override macOS's rule. That's why a small number of apps stay single-instance.

A few, yes — and we'd rather be upfront about it. Some apps are deliberately built to allow only one running copy. Others are blocked by the macOS sandbox (see above) from launching twice. In those cases the limitation comes from the app itself, not from Parallel Spaces.

The good news: the large majority of everyday apps — browsers, messengers, Electron apps and web apps — work well.

Your spaces use the app that's installed on your Mac, so they stay current automatically. If a major update changes how an app works, you can rebuild a space in a couple of clicks.

Yes. Spaces are launchers that point at the real app on your Mac. If you uninstall the underlying app, its spaces won't be able to start until you install it again.

Sadly, no. Apple only lets one copy of Safari run on your Mac, so you can't have two Safari windows signed into two different Apple IDs at the same time. That's a Safari limitation — Parallel Spaces can't work around it.

The good news: every other Mac browser does work. Run multiple copies of Chrome, Edge, Brave, Arc, Vivaldi or Firefox in Parallel Spaces. For a single website like Gmail or WhatsApp Web, turn it into a web app space instead — same result, fewer browser tabs.

The space itself is a tiny launcher (a few hundred KB). The bulk is whatever data the app inside it accumulates — cookies, cache, downloads — which is the same as a normal user account for that app.

No. There's no emulation, no container and no virtualisation — the space launches the real app with isolated data. Performance is identical to running it normally.

It turns any website into a standalone Mac app — its own Dock icon, its own window, and its own isolated storage. Great for Gmail, WhatsApp Web, Notion, your CRM, or any site you use like an app.

Yes. Web app spaces deliver native macOS notifications, so you'll get alerts from your sites just like you would from a regular app. Make sure notifications are allowed for the space in System Settings › Notifications.

Absolutely. Create as many web app spaces for the same site as you like — each one keeps its own login and session, so two (or ten) accounts run side by side.

Entirely on your Mac. Each space keeps its data in its own private folder on your device. Nothing is uploaded anywhere.

No personal data. There's no analytics, no tracking, no account to sign up for, and no server of ours that sees you or your spaces.

The one thing the app does send is an anonymous crash report, through Firebase Crashlytics (by Google), if the app crashes. The report includes diagnostic details — call stack, app version, macOS version — and nothing from inside your spaces: no logins, no cookies, no files, no identifier that ties the crash to you.

See the Privacy Policy for the full picture.

No. Isolation is the whole point — each space is sealed into its own storage and cannot read another space's logins or files.

You're in control. You can remove a space and wipe its data, and any space can be set to erase itself automatically when you quit it.

If the app crashes, an anonymous technical report is sent through Firebase Crashlytics so we can find and fix bugs faster. The report contains no personal data, no contents of your spaces and nothing that identifies you. See the Privacy Policy for the full picture.

Get it from the Mac App Store — it installs and updates like any other App Store app.

macOS 14.0 Sonoma or later. Newer macOS versions are fully supported.

Updates arrive through the Mac App Store like any other App Store app. Settings › General › Updates inside Parallel Spaces can also tell you when a new version is available and take you straight there.

The spaces you've created are small launchers that live alongside Parallel Spaces. Removing the main app doesn't delete them automatically — clean them up first from inside Parallel Spaces, or delete the launcher files manually from wherever you saved them.

When Parallel Spaces builds a space, it creates a small launcher app on your Mac. macOS asks you to approve a newly created app the first time it runs — a normal one-time security check. Approve it once and the space opens straight away every time after.

That app is designed to allow only one running copy. It's an app-level restriction that Parallel Spaces can't override. For sites and many apps there's a workaround — a web app space — which always opens independently.

Open System Settings › Notifications, find the space, and make sure notifications are allowed. Also confirm you granted the site permission to send notifications inside the space itself.

Email 29satnam@gmail.com — include your macOS version and the app you're trying to run, and we'll help.