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Mac presentation rehearsal checklist: contrast and load

A delivery rehearsal helps the speaker. A technical acceptance run proves the exact deck, audience view, rendered contrast, Mac load, and fallback.

Published July 5, 2026 Updated August 9, 2026 10 min read By John Sciacchitano

The short answer: run two passes. First, rehearse delivery in the exact deck revision. Then run a technical acceptance pass through the real audience route. Inspect the smallest text and every color that carries meaning, play the media, compare Mac load before and after one full run, and test one fallback. Record each result as passed, failed, or not tested.

This is narrower than the Mac presentation display and audio setup. That page covers room hardware, display mode, sound output, and screen sharing. Use this checklist after the route is set, when you need to decide whether one specific deck and Mac are ready to present.

Disclosure: I build TeenyApps, including TeenyColor for local screen color sampling and TeenyStat for CPU, memory, and fan speed in the menu bar. My bias is toward small native Mac utilities. The baseline is still the presentation app, macOS Displays, macOS Sound, and Activity Monitor when you need process names.

Presentation acceptance record

Evidence What to record Pass rule
Source Deck filename or shared URL, modification time, and starting slide. The file you tested is the file you will present.
Delivery Presenter view, notes, timing, and slide navigation. You can complete the talk without losing the intended sequence.
Audience view Actual room display, projector, or remote screen-share route. Text, builds, video, and pointers remain readable at audience size.
Color Failed text pair, chart series, status, link, or code token. Important content passes its chosen rule and never relies on color alone.
System state Baseline, settled stack, and post-run CPU and memory state. The same run completes without unexplained sustained load or visible lag.
Fallback Backup file and the action that switches to it. You opened or used it once during rehearsal.

01Lock the exact deck revision

Start with the file or shared URL you expect to use live. Record its filename or link, modification time, and starting slide. If the presentation pulls in a browser demo, PDF, local video, or prototype, record those inputs too.

This prevents a common rehearsal failure: approving one copy and presenting another. Names such as "final" and "final-2" are not proof. A path, timestamp, or version link is.

Keep the setup page separate from this decision. The cable and output route can pass while the wrong deck still opens. The deck can also pass on the built-in display while the audience route remains untested.

02Separate delivery rehearsal from technical acceptance

Apple Keynote's Rehearse Slideshow mode can prepare the presenter display and let you practise without an external display connected. PowerPoint Speaker Coach can give delivery feedback about pace, pitch, filler words, and reading slide text. These are useful speaker tools, but neither result proves what the audience will receive.

After the delivery pass, use the actual audience path. Connect the room display or projector, or start the real meeting and share the intended window or screen. Advance every build. Play the embedded media. Open every demo link. Check the smallest text from the audience's distance or at the remote participant's received size.

Record route-specific evidence. "Keynote rehearsal passed" describes the presenter pass. "Room display passed at slide 1 through 24" or "meeting share passed in participant view" describes technical acceptance.

03Check rendered contrast and color meaning

Inspect the audience view, not a design file or a tiny editor preview. Prioritize body text, captions, code, links, chart labels, and status colors. Write down the exact failure, such as "slide 12 code comments disappear on the room display," rather than "slide 12 looks bad."

TeenyColor uses macOS NSColorSampler, converts a pick to sRGB, copies the selected format, and keeps local history with names and pins. Its quick contrast badges compare the sampled color against white and black. Those badges are useful for those two backgrounds, but they do not calculate every foreground and background pair in a slide.

For a custom pair, sample both rendered colors and use the presentation app's accessibility checker or a purpose-built contrast checker. WCAG 2.2 uses 4.5:1 for normal text and 3:1 for large text at Level AA. Non-text graphics and interface parts use a separate 3:1 criterion when the element is required to understand or operate the content.

Contrast is only one decision. If a chart series or warning state carries meaning through color alone, add a label, pattern, icon, or direct annotation. The TeenyColor guide covers the narrower workflow for checking presentation slide contrast on Mac.

04Compare load at three checkpoints

There is no universal CPU percentage that makes a presentation safe. Compare the same Mac and the same stack at three moments: before opening the presentation, after the deck and meeting stack settle, and after one complete run through the media and demos.

TeenyStat is a first-read tool. Current Swift source uses host_processor_info for CPU, host_statistics64 for memory, and Apple SMC reads for fan speed where the Mac exposes fans. The app keeps up to 60 samples in each sparkline. That short history shows direction, not a full rehearsal log.

If a lag appears, repeat the same slide or action once. Record whether it happens only during launch, throughout the run, or after the full run. The TeenyStat companion explains the tighter diagnosis for presentation lag, CPU, and memory.

05Use Activity Monitor when the signal needs a name

A menu bar stat can show that the Mac is busy. It cannot prove whether the presentation app, browser, meeting app, helper process, or unrelated background work caused the load.

Open Activity Monitor when CPU stays high, Memory Pressure needs interpretation, or you need a process name and safe quit path. Sort by CPU for processor load. Use the Memory pane for Memory Pressure, swap, and process memory. Do not infer a memory problem from the amount of memory used alone.

If you are minutes from presenting, close ordinary apps first. Force Quit only when you understand what will stop and the risk of unsaved work is acceptable.

06Test one fallback and close the record

A fallback is accepted only after you use it. Open the backup PDF or local deck. Switch to the intended mirror mode. Confirm the remote-share fallback. Record the action that gets you there.

Keep the final note short: source revision, audience route, failed and fixed slides, load at the three checkpoints, apps closed, fallback path, and the final decision. Use "not tested" when a route or media item was skipped. Silence should never look like a pass.

If a problem repeats across rehearsals, fix the template. If it belongs to one room or one meeting route, keep the note with that event.

Ten-minute Mac presentation rehearsal

  1. Record the deck filename or URL, modification time, and starting slide.
  2. Complete the delivery pass in Keynote, PowerPoint, or the real presentation app.
  3. Open the actual room display or remote audience route.
  4. Advance every build and play each video, animation, demo, and external link.
  5. Inspect the smallest text and colors that carry meaning.
  6. Compare CPU and memory before launch, after settling, and after the full run.
  7. Repeat any lagging slide or action once and record when the lag occurs.
  8. Open Activity Monitor if the load stays high or needs a process name.
  9. Open the backup file or use the fallback route once.
  10. Mark every check passed, failed, or not tested.

Sources checked

FAQ

What should I check during a Mac presentation rehearsal?

Use the exact deck revision and live audience path. Rehearse delivery, inspect rendered slide contrast, run media and transitions, compare system load before and after the full run, then test one fallback and record the result.

Why check CPU before presenting from a Mac?

CPU and memory evidence separates presentation problems from a Mac that is still busy. Compare the same stack before launch, after it settles, and after one full run. Open Activity Monitor when load stays high or needs a process name.

Should I sample slide colors from the design file or the screen?

For rehearsal evidence, inspect the rendered audience view because that is what people will see. Use the design file only to trace a failed color back to its source value.

Is Keynote Rehearse Slideshow or PowerPoint Speaker Coach enough?

No. Those tools help with presenter display, timing, notes, or delivery feedback. They do not prove the physical room display, remote screen-share route, rendered contrast, media playback, Mac system state, or fallback.

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