Best lightweight Mac utilities

RSS reader by Brent Simmons, a name that matters in Mac indie history (NetNewsWire originally launched in 2002). The current version is open source, free, and weighs around 30MB of RAM with a few hundred feeds. Compared to Reeder, Feedly, or any web-based RSS reader, the responsiveness gap is night and day.

Sync via iCloud, Feedbin, Feedly, or NewsBlur. Native AppKit. From netnewswire.com.

The catch: the iOS version syncs via iCloud only on the App Store. Some users prefer Reeder for the broader sync-service support.

Native Gmail client. The whole point is replacing the Gmail web client (or worse, Gmail-in-Mailmate) with something that uses native macOS conventions. Idles at about 80MB, a hair above my 50MB cutoff but half what Gmail-in-a-tab costs Chrome. Including it because it is the only meaningful native Gmail option.

Listed with a note: Mimestream is subscription, which I generally argue against in the piece on subscriptions ruining Mac software. The team is small, the model is honest about what it costs to run, and there is no lifetime alternative for native Gmail. Sometimes the best lightweight option happens to be subscription. From mimestream.com.

The catch: subscription, Gmail only, no IMAP or Exchange.

Markdown notes app. The free tier covers local notes and is roughly 60MB of RAM idle on a couple thousand notes. Pro adds sync and themes. The native Mac feel is the selling point. Compared to Notion (Electron, ~400MB) or Obsidian (Electron, ~250MB), Bear is shockingly more responsive on actual editing.

Bear is also one of the few Mac note apps with a thoughtful information architecture: tags as folders, no nested hell, full-text search instant on 5,000 notes. From bear.app.

The catch: not as customizable as Obsidian. No plugin ecosystem.

Seven dots in your menu bar. Each is a notepad. About 25MB of RAM idle, native AppKit, syncs via iCloud. Detailed in the one-time-purchase roundup. The Iconfactory has been making Mac apps for over twenty years and they ship native binaries.

The catch: only seven notes by design. If that is a dealbreaker, you want Bear or Apple Notes.

Worth listing because the native macOS Calendar app, paired with Itsycal in your menu bar, is more lightweight than any third-party calendar I know of. Idles at maybe 80MB combined. Fantastical is more polished but is now subscription and roughly twice the RAM.

The catch: Calendar.app is uglier than its paid competitors. Functionality is fine.

System stats in your menu bar. CPU, memory, network, GPU, fan, battery. Native Swift, around 40MB of RAM with all modules enabled. Compared to iStat Menus (now subscription, similar memory footprint), Stats is free and open source. More in the free menu bar roundup.

The catch: configuration depth. The settings panel can be intimidating. The focused alternative is TeenyStat below.

Native Swift, sandboxed, single-purpose. Each app idles between 15MB and 30MB of RAM. TeenyMute is a Core Audio mic mute hotkey ($4.99). TeenyClip is a clipboard manager with image previews ($4.99). TeenyStat is a focused three-metric system monitor (CPU, memory pressure, fan speed) at $4.99. TeenyShelf is a drop-on-icon file shelf ($4.99). TeenyScreeny is a live screen time counter ($4.99). TeenyColor is an NSColorSampler-based system-wide picker ($4.99). Three more fill in the rest of the menu bar.

I built these because every existing alternative I tried in their category was either Electron, web-wrapped, or did fifteen things when I needed one. The TeenyApps homepage has the full set.

The catch: nine separate apps. Some people prefer one big app instead of small focused ones.

Mastodon client by the Tweetbot team. Pure native, around 70MB. The argument for including a subscription app on a lightweight list is that the alternative web Mastodon client is a Chromium tab eating 400MB. Tapbots earned Tweetbot's reputation by being the most polished native iOS and Mac dev shop in indie history.

The catch: subscription. Mastodon only (no Bluesky, no Threads).

API documentation browser. 200+ docsets, fully offline. Around 100MB with several large docsets loaded but typically under 50MB at idle. Native, not web-wrapped. Bogdan Popescu has been shipping Dash since 2011 with one-time purchase still available. The yearly subscription is for those who want continuous updates.

The catch: web docs are improving. Dash is not the only way to look up an API.

MySQL and MariaDB client. The community-maintained continuation of Sequel Pro after that project went dormant. Native, around 60MB at idle. Compared to TablePlus (paid, more features, also native) or DataGrip (JetBrains, JVM-based, ~600MB), Sequel Ace is the no-frills option.

From sequel-ace.com.

The catch: MySQL only. No Postgres, no MongoDB.

Panic's FTP, SFTP, and S3 client. Native AppKit, idles around 50MB, supports every transfer protocol you would ever need plus iCloud, Dropbox, Google Drive, Backblaze B2. Panic has been writing native Mac apps since the 1990s. Transmit is the gold standard.

The catch: GUI file transfer feels increasingly old-fashioned. CLI rsync wins on automation.

Distraction-free Markdown editor. Native, around 40MB. There is a reason iA Writer keeps its place on every lightweight Mac list a decade after launch: it loads instantly, the typing latency is the lowest of any Markdown editor I have measured, and the focus-mode UI (which iA invented) is still copied by every newcomer.

Compared to Typora ($15, also native, slightly heavier) or Ulysses (subscription, much heavier), iA Writer is the lean choice.

The catch: deliberately limited. No tables that survive export, no folder management at the file-tree level, no document database.