Blog

Everything, in writing.

Every guide, comparison and feature write-up on this site, in one place: 59 pieces, grouped by what they're for.

Latest

Security and IT Parallex in managed fleets Deploy it, lock its settings, and know what your security tools will see. Security and IT Reporting a security problem How to report a security problem in Parallex or its website, what's covered, and what happens after you write. What's new Parallex 3.0 Describe it, share it, carry it to your other Mac, and run agents side by side. What's new Describe your setup, and Parallex makes the copies Say what you juggle in a sentence. Nothing is made until you build.

What's new

Each big release, and the features that came with it.

  1. Parallex 3.0Describe it, share it, carry it to your other Mac, and run agents side by side.
  2. Describe your setup, and Parallex makes the copiesSay what you juggle in a sentence. Nothing is made until you build.
  3. Share a setup as a linkWhich copies, in which workspaces. Never your data or sign-ins.
  4. Move an app to your new Mac, still signed inOne encrypted file, signed in where the app allows. A move, never a clone.
  5. Run Claude Code agents in parallel, and merge the best oneSealed lanes in worktrees of their own. Compare them, merge the one you pick.
  6. What's changing in Parallex 2.0Parallex 2.0 is a one-time purchase, with a 14-day free trial. Every Mac that used Parallex up to October 4 gets Pro free.
  7. Every release of ParallexWhat changed in each version, with its downloads.

Using Parallex

The everyday parts: finding a copy, going back, and tips.

  1. The switcher: every copy, one shortcut away⌃⌥Space, a few letters, Return. Or type what to do.
  2. Undo an app update, or roll back an app's dataGo back a version, data and all, or to yesterday's snapshot.
  3. Suggestions that stay on your MacNo windows, typing or browsing, and nothing sent anywhere.

AI accounts and agents

Several Claude, Codex and ChatGPT accounts, and agents with identities of their own.

  1. One Claude setup, every Claude accountYour CLAUDE.md, skills and plugins in every account. Sign-ins stay apart.
  2. Usage for each AI account, in the menu barToday and the 5-hour window for each account, from the logs on your Mac.
  3. Folders that switch who you are in Terminalcd into ~/work, and git, gh, Claude Code and Codex are the work account.
  4. Agent workspacesIts own git author, signing key, token and network, with rewind.
  5. Two Claude Code accounts on one MacOne config folder per account, both signed in at once.

Comparisons

Every other way to run an app twice, and where each one is the better choice.

  1. Work and personal apps on one Mac, kept apartUser accounts, Focus, Spaces, browser profiles and separate apps, compared.
  2. How to run two copies of an app on a MacOpen the same Mac app twice, signed in to two accounts: Terminal's open -n, a second user account, browser profiles, the web version, Parall and Parallex, compared honestly.
  3. Parallex and Parall, side by sideParall makes launcher shortcuts that start an app with its own data folder; Parallex can also make an app its own copy, App Store apps included. An honest, dated comparison.
  4. Parallex or a second macOS user account?A second user account separates everything but shows one account at a time. Parallex separates one app and keeps both open side by side. When each is the better choice.
  5. Parallex or browser profiles?Browser profiles separate websites inside one browser. Parallex runs separate copies of Mac apps, and of browsers too, each with its own Dock icon. When a profile is enough.
  6. Parallex or the web version in another browser?Using the website for a second account is free and works for Slack, WhatsApp, Discord and Teams. Where it falls short, and when a second copy of the app is better.

Security and IT

What Parallex does to an app, what leaves your Mac, and deploying it to many Macs.

  1. Parallex in managed fleetsDeploy it, lock its settings, and know what your security tools will see.
  2. Reporting a security problemHow to report a security problem in Parallex or its website, what's covered, and what happens after you write.
  3. How Parallex worksWhat Parallex does to an app to run it twice, in plain words: copies, signatures, the library it loads, and what it never touches.
  4. Which Mac apps can run twice? Nightly compatibility resultsEvery night a clean Mac makes a fresh second copy of over 30 popular Mac apps (Slack, WhatsApp, Discord, Claude, Chrome, Teams and more) and checks it runs apart from the original. Every result, dated.
  5. What leaves your MacEverything Parallex sends anywhere, and what's kept.

App guides

Two accounts of one app, side by side, app by app. Also on one page.

SlackTwo Slack accounts on one Mac DiscordTwo Discord accounts open at once on a Mac WhatsAppTwo WhatsApp accounts on one Mac TelegramTwo Telegram windows, two accounts, on one Mac SignalTwo Signal accounts on one Mac ClaudeTwo Claude accounts on one Mac: work and personal ChatGPTTwo ChatGPT accounts open on one Mac CursorTwo Cursor accounts or setups on one Mac Visual Studio CodeTwo VS Code instances with separate accounts and extensions ZedTwo Zed editors at once on a Mac NotionTwo Notion accounts side by side on a Mac FigmaTwo Figma accounts on one Mac LinearTwo Linear accounts open on one Mac PostmanTwo Postman accounts or workspaces on one Mac SpotifyTwo Spotify accounts on one Mac ObsidianTwo separate Obsidian setups on one Mac Google ChromeTwo separate Chromes on one Mac, beyond profiles Microsoft TeamsTwo Microsoft Teams accounts on one Mac ZoomTwo Zoom accounts open at once on a Mac GitHub DesktopTwo GitHub Desktop accounts on one Mac MattermostTwo Mattermost accounts on one Mac ElementTwo Element (Matrix) accounts open at once on a Mac InsomniaTwo Insomnia accounts on one Mac MiroTwo Miro accounts open at once on a Mac Notion CalendarTwo Notion Calendars on one Mac FirefoxTwo Firefox profiles open at once on a Mac ThunderbirdTwo Thunderbird profiles open at once on a Mac BraveTwo separate Brave browsers on one Mac Microsoft EdgeTwo separate Microsoft Edge browsers on one Mac VivaldiTwo separate Vivaldi browsers on one Mac GhosttyTwo separate Ghostty terminals on one Mac VLCTwo VLC players at once on a Mac IINAA second IINA with its own settings on one Mac