Notes on small, private Mac apps.

Practical guides to Mac privacy and screenshots, on-device and no account. I write them from building the apps that do the job.

• How to get a Google Meet transcriptThe three clicks that start a transcript in Google Meet, and which Workspace editions have the button at all. Where the Doc lands in Drive after Google moved it in July 2026, plus the on-device route on a Mac.
• Where are Zoom transcripts saved?A transcript saved in the meeting is a TXT file in ~/Documents/Zoom, a cloud transcript is a VTT in the web portal, and a local recording makes none at all. The paths, who can open it, and how long it lasts.
• How to turn off transcription in ZoomZoom's saved transcript, its live captions and AI Companion are three separate switches in three places. The current web portal path for each, and what a participant can actually do when the host has it on.
• Do Mac screenshots contain metadata?Yes, and far less than you fear: no GPS and no camera data. But Mac file metadata is three separate layers, and Get Info shows you the one layer that never leaves your machine.
• How to transcribe a Teams meetingThe click path for live transcription, and every documented reason the button is greyed out for guests and external attendees. Where the transcript lands afterward, and the on-device route on a Mac.
• Where are Teams meeting transcripts stored?The organizer's OneDrive, the channel's SharePoint site, or the recorder's own account, depending on the meeting. Who can read it, the 120-day expiry, and where to look when a transcript goes missing.
• How to transcribe a meeting without recording itTeams separates transcription from recording, but the transcript is still a stored, discoverable file. What each platform keeps, why Copilot's transient mode is off by default, and the on-device route.
• How to check your Mac's performanceFour numbers tell you how a Mac is doing, and the famous one misleads: %CPU is active residency, not work. How to read cores, memory pressure and thermal state, and benchmark so throttling shows up.
• Why are my Mac fans running at full speed?Fans pinned at maximum are usually a fault, not a workload: a Mac that loses its temperature reading fails safe and runs the fans flat out. One question splits every cause, and a fan app fixes almost none.
• How to record a meeting on a MacQuickTime and the screenshot toolbar record only your microphone, never the other person's voice. The three ways to capture a meeting's audio on a Mac, and the honest trade-offs between each one.
• How to record internal audio on a MacmacOS won't record its own system audio out of the box. The two routes that work: a virtual audio driver like BlackHole or Loopback, or a ScreenCaptureKit app that taps the sound directly with no driver.
• How to transcribe a Zoom meetingThree routes to a Zoom transcript: Zoom's paid cloud transcript, a cloud uploader, or transcribing it on your Mac. Why speaker labels stay unreliable, and the on-device way that never uploads your audio.
• How to record a Zoom meeting on a MacRecord a Zoom meeting on a Mac two ways: Zoom's recorder when you're the host or have permission, or capturing the audio yourself when you're not. The external route records both sides on-device, no bot.
• How to record a Google Meet you don't hostMeet's own recorder is host-only and locked to paid Workspace plans, so a guest can't press record. How to capture the call yourself on your Mac by recording system audio, no bot in the participant list.
• How to censor a screenshot on a MacHow to censor a screenshot on a Mac before you post or share it, covering a face, a name or a message. The quick way in Preview, which covers actually hold up, and the fast on-device way.
• How to blur part of a screenshot on a MacmacOS has no built-in blur tool. How to cover part of a screenshot on a Mac, the catch most guides skip (a blur can be undone), and which methods are actually safe for sensitive information.
• How to blur text in a photo on a MacHow to blur text in a photo on a Mac with Photos and Preview, and the catch every tutorial skips: a blur hides text but does not remove it, so for a real secret you need redaction, not a blur.
• Can you reverse a blurred or pixelated image?It depends what was blurred. An out-of-focus photo can be sharpened but only approximated, deliberately pixelated text can be reconstructed exactly, and a content-independent scramble reverses to nothing.
• How to blur a face in a photo on a MacHow to blur a face in a photo on a Mac with Photos or Preview, why a soft blur can be undone and blur-online tools upload your photo first, and how to hide a face on-device so it stays hidden.
• Is it safe to share screenshots?Usually yes, but a screenshot leaks more than you notice: something in the frame you missed, a blur or crop that can be undone, a little metadata. The real risks, and how to share one safely.
• How to hide an API key in a screenshotNever blur or pixelate a key, because a short string in a known font is the easiest thing to reconstruct. Cover it with an opaque block on-device, export a fresh file, then rotate the key. It is burned.
• How to redact a bank statement on a MacWhat to black out on a bank-statement screenshot and what to keep, why a blurred account number can be rebuilt, why an online tool means uploading it, and the safe on-device way to do it on a Mac.
• What is aCropalypse? The screenshot crop bug explainedaCropalypse (CVE-2023-21036) let the cropped-out part of a screenshot be recovered when the editor saved over the original. What it was, which apps it hit, whether your Mac was affected, and the fix.
• How to share a revenue screenshot without leaking dataA revenue screenshot leaks more than the headline number: customer names and emails, an MRR breakdown, a payout bank last four. What to crop, why blurring a name does not work, and how to check.
• How to blur customer data in a support screenshotWhat counts as customer data in a support ticket, why a leaked screenshot is a reportable breach, why a blur can be rebuilt and an online tool leaks it, and the safe on-device way to hide it.
• How to hide a card or account number in a screenshotA card or account number is the easiest thing to un-blur, because a short run of digits in a known font barely resists a solver. Cover it with a solid block on your Mac, never blur it, then check it.
• Obfuscation vs redaction: what is the difference?Redaction removes information so it cannot be recovered. Obfuscation only obscures it, and a blur, a pixelation or a layered box can be brought back. The difference, and why it is the whole game for an image.
• How to share a screenshot safely on GitHub or SlackA dev screenshot leaks more than the bug: a token in a logged header, an internal hostname, a customer's data in a log line, another channel behind the window. What leaks where, and how to share one clean.
• How to redact a CV or salary screenshotA recruiter hiding a candidate's details and a job-seeker sharing an offer face the same job. What to hide and what to keep, why blurring a phone number or date of birth leaks, and the safe on-device way on a Mac.
• How to redact an invoice before sharing itShare an invoice as proof of work or in a dispute without leaking the client's name, bank details or references. What to hide, what to keep, why never to blur a structured number, and the safe way on a Mac.
• Screenshots and GDPR: when sharing one is a data breachA screenshot is personal data whenever it identifies a living person, so sharing it to the wrong place can be a data breach, no hacker needed. What GDPR actually says, and why a blur does not count as removing the data.
• How to redact a screenshot on a MacBlurring sensitive text is not the same as removing it. How redaction really works on a Mac, why a reversible blur or a layered black box can leak, and how ScrubShot rewrites the pixels so what you scrub is gone.
• Task Manager on a Mac: where it is and how to open itThe Task Manager on a Mac is Activity Monitor. How to open it with Cmd+Space, force quit a frozen app with Cmd+Option+Esc, and sort by CPU to find whatever is heating your Mac and slowing it down.
• How to check CPU usage on a MacHow to check CPU usage on a Mac in Activity Monitor: the % CPU column, telling System load from User load, and what a healthy figure looks like. Plus the Dock graph and the top command in Terminal.
• Do cooling pads work for a MacBook?Do cooling pads work for a MacBook? For most modern Macs they do very little, because heat leaves through the vents and the body rather than the bottom panel. What actually helps keep it cool instead.
• What is WindowServer on Mac?WindowServer is the macOS process that draws everything on your screen, so some CPU and memory use is normal. Why it sometimes climbs far higher, how to bring it back down, and how it ties into heat.
• Why is kernel_task using so much CPU?High kernel_task CPU is macOS actively cooling your Mac, not malware or a bug. Why it spikes and holds the CPU, what it is really doing when it does, and how to bring the temperature back down for good.
• The best Mac temperature monitor appsAn honest round-up of the best Mac temperature monitor apps: iStat Menus, Stats, TG Pro, Macs Fan Control and ChillBlades. What each one actually shows you, and how to choose the right one for you.
• How to clean your Mac's fansHow to clean a MacBook fan properly: blowing the dust out with compressed air without opening it, when it is worth opening up, and what it costs. Plus where dust is not actually the cause of the heat.
• Why does my Mac fan keep running?Why your MacBook Air or Pro fan keeps running and never spins down to idle, and how to find what won't let go in Activity Monitor. Plus how to set a lower idle floor so the machine settles down.
• ChillBlades vs smcFanControlHow ChillBlades and smcFanControl compare for Mac fan control, from Apple Silicon support to upkeep and price. The modern smcFanControl alternative for M-series Macs, and when each one makes sense.
• Is Mac fan control software safe?Is Mac fan control software safe? What these apps really do to the fan controller and where the risk is and isn't, plus how ChillBlades clamps every fan to Apple's limits and never touches thermal protection.
• MacBook fan rattling or clicking noise?A rattling or clicking MacBook fan is a mechanical fault, not something software can fix. How to tell a real fault from normal fan noise, what usually causes it, and what actually puts it right.
• Why is my MacBook running slow and hot?Why your MacBook runs slow and hot at the same time: heat triggers thermal throttling, which trades speed for safety. How to find the cause in Activity Monitor, and the fixes that genuinely help.
• MacBook overheating, screen going black?If your MacBook overheats and the screen goes black or it shuts down, that is macOS protecting the chip, not a failure. Why it happens, how to cool it down fast, and the airflow fix that prevents it.
• How to fix an overheating MacThe fix list for an overheating MacBook, in order, from quitting the heaviest app and clearing the vents to taking over the fans yourself. Plus the common myths that waste your time, and what to skip.
• Mac fans not spinning on M3 or M4?On an M3 or M4 Mac, fans at 0 RPM is almost always normal rather than a fault, because Apple Silicon parks them. Why that happens, when silence is a real problem, and how to spin them up yourself.
• Does Macs Fan Control still work on M3 and M4 Macs?Macs Fan Control on M3 and M4 Macs: what still works and what quietly changed on Apple Silicon, where the setting can look applied while nothing happens. How to get reliable fan control on the newest chips.
• Why your Mac fans roar on Zoom and Teams callsWhy your Mac's fans roar during Zoom and Teams calls, and what macOS is actually reacting to when they spin up. How to get ahead of the heat so the fans stay quiet in the moment it matters most.
• ChillBlades vs ThermalForgeHow ChillBlades and the open-source ThermalForge compare on fan control, setup, support and price. Which one fits if you just want your Mac cooler without the tinkering, and which one rewards it.
• Mac fan control for developersLong compiles, Docker and test runs heat a Mac until it throttles and your build times drift. How taking over the fans keeps performance consistent under sustained load, and what it can and can't do.
• MacBook Air vs MacBook Pro: why the fanless Air throttlesWhy a fanless MacBook Air throttles under sustained load where a MacBook Pro keeps going, and what that difference actually costs you. Where fan control helps on the Pro, and why it can't rescue the Air.
• What is thermal throttling on a Mac?Thermal throttling is your Mac's chip deliberately slowing itself down to shed heat, not a fault. What it is, how Apple Silicon and Intel differ, the signs you are hitting it, and how to confirm it.
• How to keep your Mac cool while gamingHow to keep your Mac cool while gaming and hold your frame rate, starting by spinning the fans up early with Auto Boost before a game heats the chip. Plus vents, airflow and what else genuinely helps.
• How to keep your Mac cool while editing videoWhy editing and exporting video heats a Mac until it throttles, and what genuinely keeps it cool and fast. Spinning the fans up before a render, working with proxies, airflow, and the rest that matters.
• ChillBlades vs Macs Fan ControlHow ChillBlades and Macs Fan Control compare on fan control, sensors, simplicity and price. Whether it is worth paying at all when Macs Fan Control is free, and where each one actually wins.
• How hot is too hot for a Mac?What a normal Mac temperature actually is, the range Apple Silicon is built to run across, and the point where heat stops being harmless and starts costing you speed. Plus what you can do about it.
• How to control your Mac's fansHow to take control of your Mac's fans, whether by hand with a slider or with an Auto Boost band that spins them up before the heat hits. How Mac fan control works under the hood, and what is safe.
• Why is my Mac so hot?Why your Mac runs hot and overheats, from heavy load and runaway processes to blocked vents and Apple Silicon keeping the fans parked at idle. How to find the real cause, and the fix for each one.
• Why are my Mac's fans so loud?Why your MacBook fans suddenly roar, and what macOS is actually reacting to when they do. The honest list of what genuinely makes Mac fans quieter, and the one thing that no app can ever do.
• Why won't my Mac's fans turn on?On Apple Silicon, fans at 0 RPM is usually normal rather than a fault, because macOS parks them until the Mac is warm. When zero is fine, when it is a real problem, and how to spin the fans up yourself.
• How to check your Mac's temperaturemacOS ships no built-in temperature readout, so the ways to check your Mac's CPU temperature run from a Terminal command to a live menu-bar figure. What each method shows, and what the numbers mean.
• The best Mac fan control apps in 2026An honest round-up of the Mac fan control apps worth knowing in 2026: ChillBlades, TG Pro, Macs Fan Control and smcFanControl. What each one is genuinely good at, and how to pick the right fit.
• ChillBlades vs TG ProHow ChillBlades and TG Pro compare on fan control, monitoring, complexity and price. Which fits if you just want your Mac cooler with a slider, and which fits if you want a full sensor dashboard.
• Why I built ChillBladesmacOS keeps the fans off until the Mac is already hot, and the tools I tried were either sprawling dashboards or quietly broken on the newer chips. So I built the simple fan dial I actually wanted.