--- title: Portero: Know exactly what's running on every port of... description: Portero is a free, open source Mac app that displays all open ports and the processes behind them. It lets developers see what's running on each port, kill... canonical: https://daily.dev/posts/portero-know-exactly-what-s-running-on-every-port-of-your-mac-saeysdtq9 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Portero: Know exactly what's running on every port of your Mac | daily.dev og:description: Portero is a free, open source Mac app that displays all open ports and the processes behind them. It lets developers see what's running on each port, kill... og:url: https://daily.dev/posts/portero-know-exactly-what-s-running-on-every-port-of-your-mac-saeysdtq9 og:image: https://api.daily.dev/og/posts/sAEYsDtQ9.png og:image:alt: Portero: Know exactly what's running on every port of your Mac og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Portero: Know exactly what's running on every port of your Mac **[Product Hunt](https://daily.dev/sources/ph)** · 1 min read · 36 upvotes · 3 comments ## Summary Portero is a free, open source Mac app that displays all open ports and the processes behind them. It lets developers see what's running on each port, kill processes occupying busy ports, resolve 'address already in use' errors, and block ports using the built-in macOS firewall. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@jenueldev** · 1 upvotes > The useful part isn’t just seeing the PID; tying discovery, termination, and firewall rules into one view shortens the loop from “address already in use” to a deliberate fix. The safety edge matters too: showing the launch path and owner, then confirming before killing or blocking a system-owned process, would make it much harder to disrupt macOS services accidentally. **@hardik15** · 0 upvotes > Looks great from the explanation and screenshots. > > > GUI and ease of use should be the key for this kind of apps, else terminal options are still work the best. **@vladislavarbatov** · 0 upvotes > I was in the process of making the identical tool myself and im glad someone had this idea as well and created a good app ## Similar posts on daily.dev - [I launched Port Pilot](https://daily.dev/posts/i-launched-port-pilot-j9k2a75bz) · Flavio Copes · 1 upvotes · 1 comments --- Tags: [#open-source](https://daily.dev/tags/open-source), [#devtools](https://daily.dev/tags/devtools), [#monitoring](https://daily.dev/tags/monitoring), [#mac](https://daily.dev/tags/mac) [View this post on daily.dev](https://daily.dev/posts/portero-know-exactly-what-s-running-on-every-port-of-your-mac-saeysdtq9) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Portero: Know exactly what's running on every port of your Mac","url":"https://daily.dev/posts/portero-know-exactly-what-s-running-on-every-port-of-your-mac-saeysdtq9","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/portero-know-exactly-what-s-running-on-every-port-of-your-mac-saeysdtq9"},"datePublished":"2026-07-14T07:31:55.550Z","dateModified":"2026-07-14T20:17:32.454Z","description":"Portero is a free, open source Mac app that displays all open ports and the processes behind them. 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The safety edge matters too: showing the launch path and owner, then confirming before killing or blocking a system-owned process, would make it much harder to disrupt macOS services accidentally.","datePublished":"2026-07-15T02:06:00.777Z","url":"https://daily.dev/posts/sAEYsDtQ9#c-76wdFxoAm","author":{"@type":"Person","name":"Jenuel Oras Ganawed","url":"https://daily.dev/jenueldev","image":"https://media.daily.dev/image/upload/s--BadmiNyj--/f_auto/v1787625077/avatars/avatar_JJtZr4Sjm?_a=BAMAMicg0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1}},{"@type":"Comment","text":"Looks great from the explanation and screenshots.\nGUI and ease of use should be the key for this kind of apps, else terminal options are still work the best.","datePublished":"2026-07-15T04:53:05.717Z","url":"https://daily.dev/posts/sAEYsDtQ9#c-b2GLR3dFr","author":{"@type":"Person","name":"Hardik","url":"https://daily.dev/hardik15","image":"https://media.daily.dev/image/upload/s--O0TOmw4y--/f_auto/v1715772965/public/noProfile"}},{"@type":"Comment","text":"I was in the process of making the identical tool myself and im glad someone had this idea as well and created a good app","datePublished":"2026-07-15T11:44:52.630Z","url":"https://daily.dev/posts/sAEYsDtQ9#c-IzYqawsaZ","author":{"@type":"Person","name":"Vlad Arbatov","url":"https://daily.dev/vladislavarbatov","image":"https://media.daily.dev/image/upload/s--WkI270Xw--/f_auto/v1775206877/avatars/avatar_ZvUOgB0XGidkEjniHvsTu?_a=BAMAMiWQ0"}}]} ```