Practice the interview before it counts.
A lifelike interviewer asks, listens, and follows up in real time — then Callback scores your answers and shows you exactly what to fix.
macOS · Apple Silicon & Intel · Free during the beta·Mac won’t open it the first time? Here’s the fix
From cold to confident in one sitting.
Set up your interview
Drop in the role, company, and résumé. Pick the round and how hard it pushes.
Sit the interview
Speak with a real interviewer who listens, reacts, and follows up — out loud, in real time.
Get scored & coached
Walk away with a hire-readiness score, per-skill breakdown, and your answers rewritten.
Know exactly where you stand.
Every session ends with a hire-readiness score and a breakdown across the competencies interviewers actually grade — product sense, communication, rigor, leadership — each with a note on why.
Leave with your answers, rewritten.
Callback takes what you actually said and tightens it — quantified, structured, and ready to reuse. Study-ready answers in your own voice, not generic scripts.
Specific praise. Specific fixes.
No vague 'be more confident.' Callback points to the exact moments that landed, the ones that didn't, and shows a stronger version of each.
Every answer, graded.
Scroll back through the whole interview with a score and a note on each question — and a sharper answer you can practice next time.
A different interviewer every round.
Recruiter screen, hiring manager, senior leader — each round is a distinct person with their own voice and demeanor, so you practice reading the room, not just the questions.
Practice the same role until you nail it.
Re-interview a job as many times as you like. Callback tracks your score and per-skill trend across attempts, so improvement is something you can actually see.
Opening Callback the first time
Callback is in beta and isn’t signed with an Apple Developer certificate or notarized yet, so the first time you open it your Mac shows a security warning. This is normal for beta apps distributed outside the App Store — verify the download with the checksum below, then follow these steps (about a minute, and only once). Developer-ID signing and notarization are on the way.
The message you’ll see
“Apple could not verify ‘Callback’ is free of malware that may harm your Mac or compromise your privacy.”
That’s expected. Just don’t click Move to Trash — follow the steps below instead.
- 1
Open the downloaded Callback.dmg, then drag the Callback icon onto the Applications folder shown beside it.
- 2
Open your Applications folder and double-click Callback. When the warning appears, click Done — again, not “Move to Trash.”
- 3
Click the Apple menu () in the top-left corner, then System Settings → Privacy & Security. Scroll down to the Security section near the bottom.
- 4
You’ll see “Callback was blocked to protect your Mac.” Click Open Anyway, then confirm with your Mac password or Touch ID. Callback opens — and your Mac won’t ask again.
On older macOS (Sonoma or earlier) it’s quicker: right-click (or Control-click) the Callback app in Applications, choose Open, then click Open in the dialog.
Still won’t open? Open the Terminal app (Applications → Utilities), paste the line below, press Return, then open Callback again. You only need to do this once.
xattr -dr com.apple.quarantine /Applications/Callback.appVerify your download
Want to confirm you got the genuine file? In Terminal, run the command below on the downloaded Callback.dmg and check that the output matches the SHA-256 we publish with each release.
shasum -a 256 Callback.dmgExpected SHA-256: 20bb698f0a22df633891d0b26048a90af9d22f6ad053b571aff067287005b52f
This checksum is published with each release, so it changes whenever we ship a new build.
Stuck on any step? Email [email protected] and we’ll walk you through it.
Walk in already warmed up.
Run your first mock interview today — and never let the real one be your first rep.
macOS · Apple Silicon & Intel · A Vorvano product