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How-To Guides 14/03/2026 9 min read

How to Speed Up Your Mac for Free (2026 Guide)

Ten free steps to make your Mac noticeably faster today — no paid software required. From clearing startup items and resetting the SMC to managing storage pressure and cleaning your Downloads folder.

Your Mac Is Probably Faster Than You Think

Before spending anything on a new machine or paid optimisation software, work through these ten free steps. In our experience at ZA Support, after 16 years of Mac repairs and Health Checks in Johannesburg, the majority of slow Macs are suffering from fixable software and configuration issues, not hardware failure.

These steps are in order of impact. Start at Step 1 and stop when your Mac feels fast again.

Step 1: Check Your Available Storage (Most Common Cause)

macOS uses free disk space as virtual memory. When your drive fills up, the operating system has nowhere to write temporary data and the entire system slows to a crawl.

**How to check:** Apple menu → About This Mac → Storage (or System Settings → General → Storage on Ventura and later).

**What you are looking for:** If you have less than 15–20% of your drive free, storage pressure is almost certainly contributing to your slowness.

Free fixes:

  • Open Finder → Go → Downloads. Delete anything you no longer need.
  • Empty the Trash (Finder → Empty Trash). Files in the Trash still count against your storage.
  • On macOS Ventura and later: System Settings → General → Storage → scroll down to see recommendations. "Store in iCloud" and "Optimise Storage" are free and effective if you have an active iCloud plan.
  • Move large video files and photo libraries to an external drive.

    • A Mac with 5 GB free on a 256 GB drive can feel unusable. Freeing up 30–40 GB can transform performance overnight.

    Step 2: Remove Login Items That Start Automatically

    Every application that launches at startup competes for CPU and RAM before you have opened anything. Macs accumulate login items silently over years — cloud backup apps, printer utilities, updater daemons — and after a while, a dozen processes are fighting for resources before you have opened Safari.

    **macOS Ventura and later:** System Settings → General → Login Items. Review "Open at Login" and "Allow in Background." Remove anything you do not immediately need at startup.

    **macOS Monterey and earlier:** System Preferences → Users & Groups → Login Items → select the item → click the minus (–) button.

    **Recommended to remove:** Printer utilities, software updaters for apps you rarely use, cloud sync clients for services you do not actively use. Keep: Zoom or Teams if you use them daily, backup software you rely on.

    This single step can dramatically reduce startup time and free up several hundred megabytes of RAM.

    Step 3: Reset the SMC (System Management Controller)

    The SMC manages power delivery, fans, sleep behaviour, and thermal management on Intel Macs. A corrupted SMC state can cause sluggishness, runaway fan speeds, battery issues, and unresponsiveness.

    Intel Mac (MacBook with removable battery — pre-2017):

    Shut down. Remove the battery. Hold the power button for 5 seconds. Reinstall battery. Start normally.

    Intel Mac (MacBook with non-removable battery — 2017 onwards):

    Shut down. Hold Shift + Control + Option + Power simultaneously for 10 seconds. Release all keys. Press Power to start.

    **Apple Silicon Mac (M1–M4):** There is no SMC on Apple Silicon. If you are on an M-series Mac, skip to Step 4.

    **When it helps:** Slow response, fans running at full speed constantly, battery not charging correctly, display backlight behaving strangely, Mac not waking from sleep.

    Step 4: Reset NVRAM / PRAM

    NVRAM stores small pieces of configuration data: display resolution, startup disk selection, time zone, and speaker volume. Corrupted NVRAM can cause boot slowness and erratic behaviour.

    **Intel Mac:** Shut down. Press Power, then immediately hold Option + Command + P + R for about 20 seconds (you will hear the startup chime twice on older models, or see the Apple logo appear and disappear twice on newer ones).

    **Apple Silicon Mac:** NVRAM resets automatically on Apple Silicon when needed. No manual step required.

    Step 5: Check Activity Monitor for CPU Hogs

    A single misbehaving process can consume an entire CPU core, making everything else feel sluggish.

    **Open Activity Monitor:** Applications → Utilities → Activity Monitor → CPU tab. Sort by % CPU descending.

    **Normal to see:** kernel_task, windowserver, and your open applications. A brief spike from any app is normal.

    **Investigate:** Any unfamiliar process using more than 20–30% CPU continuously when you are not doing anything demanding. Right-click the process → Inspect → Open Files and Ports can help identify what it is.

    Common culprits:

  • mdworker / mds_stores: Spotlight indexing — normal after an update, will finish on its own
  • cloudd / bird: iCloud sync — sign out and back into iCloud if this is stuck
  • Any process you do not recognise consuming sustained high CPU: search the name online before force-quitting

    • Step 6: Clean Out Your Downloads Folder

    The Downloads folder is one of the most neglected storage locations on most Macs. Over a few years, it accumulates gigabytes of old installers (.dmg, .pkg), ZIP files, PDF downloads, and attachments. It also often contains hundreds of small files that never get indexed efficiently.

    Open Finder → Go → Downloads. Sort by Size (click the Size column header in List view). Delete installer files (.dmg, .pkg) for software you have already installed. They cannot be used again without downloading fresh copies anyway.

    Sort by Date Added and delete anything older than six months that you have not opened.

    This is free, takes five minutes, and often recovers 10–20 GB on machines that have been in use for a few years.

    Step 7: Reduce Visual Effects (Older Macs)

    On Macs from 2015–2019 with integrated graphics, the transparency, animation, and blur effects in macOS can consume meaningful GPU resources.

    **macOS Ventura and later:** System Settings → Accessibility → Display → enable "Reduce Motion" and "Reduce Transparency."

    **macOS Monterey and earlier:** System Preferences → Accessibility → Display → tick "Reduce Motion" and "Reduce Transparency."

    On modern Macs (2020 and later, including all Apple Silicon models), this makes little practical difference. On older Intel machines with 4 GB or 8 GB of RAM, reducing visual effects can noticeably improve responsiveness.

    Step 8: Update macOS

    Apple ships performance fixes and under-the-hood improvements in every macOS update. Running a version that is one or two major releases behind can mean missing substantial optimisations — particularly on Apple Silicon where energy efficiency and performance improvements arrive frequently.

    Apple menu → System Settings → General → Software Update.

    Install any available updates. For a major macOS version upgrade, check your critical applications for compatibility first — particularly if you use specialist software like medical, legal, or creative tools.

    Step 9: Reindex Spotlight

    If Spotlight suggestions are slow, searches take a long time, or the mdworker process is consistently consuming CPU even weeks after an OS update, Spotlight's index may be corrupted. Reindexing forces a fresh rebuild.

    To reindex Spotlight on macOS Ventura and later:

    1. System Settings → Siri & Spotlight → Spotlight Privacy

    2. Click the + button and add your Macintosh HD (main drive)

    3. Wait 10 seconds

    4. Select Macintosh HD and click the – button to remove it

    5. Spotlight will begin reindexing — this takes 30 minutes to several hours depending on drive size

    While reindexing, the Mac may run warm and the fan may spin up. This is normal. Performance will improve once indexing completes.

    Step 10: Check Browser Extensions and Tabs

    This step is specific to Mac users who spend most of their time in a web browser. Chrome and Safari with many tabs and extensions open are among the heaviest consumers of RAM and CPU on modern Macs.

    **Check your tab count:** More than 15–20 tabs open in a browser on an 8 GB Mac will cause memory pressure. Use bookmarks or a tab manager extension to reduce open tabs.

    **Audit browser extensions:** In Chrome: chrome://extensions — disable or remove extensions you do not actively use. In Safari: Settings → Extensions. Each extension runs in the background and consumes resources.

    **For Chrome users specifically:** Chrome has its own Task Manager. Menu → More Tools → Task Manager. This shows which tabs and extensions are consuming the most CPU and memory, and you can close individual tabs directly from this list.

    When Free Steps Are Not Enough

    If you have worked through all ten steps and your Mac is still performing below expectations, the cause is likely hardware:

  • **Thermal throttling:** Dried-out thermal paste causes the CPU to overheat and reduce its clock speed. Thermal paste replacement at ZA Support can reduce temperatures by 20–30°C on machines 4+ years old.
  • **Insufficient RAM:** Intel Macs with 8 GB running macOS Sonoma or later under a typical workload (browser, Zoom, Office) are frequently memory-constrained. A RAM upgrade from 8 GB to 16 GB is available fitted at our Hyde Park workshop.
  • **Failing SSD:** Early-stage SSD failure causes dramatically increased read/write latency. Download DriveDx and check S.M.A.R.T. status.

    • For issues beyond DIY, [ZA Support offers assessment](/macbook-repair). We run a full 28-phase Health Check, give you a plain-English report of exactly what we found, and quote any recommended repairs before touching anything. Assessment: R899 ex VAT. Hyde Park, Johannesburg.

    WhatsApp us on [064 529 5863](https://wa.me/27645295863) to book a same-day assessment.

    Need a repair? Assessment: R899 ex VAT.

    Hyde Park, Johannesburg. Assessment: R899 ex VAT on all repairs.

    Call 064 529 5863
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