Support
Nearly everything that goes wrong with an app that lives in the notch is one of the five things below. If it isn't, write and say so.
Common fixes
OreoNotch needs Accessibility permission to suppress the system HUD. Open System Settings → Privacy & Security → Accessibility and make sure OreoNotch is switched on. If it's already listed and on, switch it off and on again — macOS sometimes keeps a stale entry after an app updates.
This one is not available in the App Store version, which the sandbox does not allow to suppress system HUDs.
Open System Settings → Privacy & Security → Calendars and check OreoNotch is enabled there. If OreoNotch isn't in the list at all, quit it and open it again so it can ask a second time.
If you've just added a new calendar account, it can take a moment to appear — OreoNotch refreshes its list of accounts when it comes back to the front, so clicking away and back usually does it.
Check three things, in this order: you're signed into the same iCloud account on both Macs; iCloud Drive is switched on in System Settings; and sync is enabled in OreoNotch's own settings on both machines.
Sync is push-based, so a change usually lands within a few seconds. If one Mac has been asleep, its changes arrive when it wakes. If nothing has moved in several minutes with all three of the above true, send a diagnostics report — it includes the sync status without including any of your to-dos.
OreoNotch needs Bluetooth permission, which macOS only asks for once. Check System Settings → Privacy & Security → Bluetooth. Battery levels also only appear for devices that report them — most AirPods and Beats models do, most third-party headphones don't.
Start the drag first, then move over the notch — the notch only becomes a drop target once a drag is already in progress, and it will expand slightly to show it's ready. If you're dragging from an app that isn't finished writing the file yet (a browser mid-download, for instance), wait for it to finish first.
That usually means the download was interrupted. Delete it, download again from this site, and open the DMG. Every build here is signed with a Developer ID and notarised by Apple, so a complete download will open without any warning at all — you should never need to right-click → Open, and if you do, something is wrong and we'd like to know.
If that didn't help
Open OreoNotch's settings, go to the last tab and choose Generate diagnostics report. It writes a plain text file you can read in full before sending — it carries versions, permission states and counts, and deliberately not the content of anything. The list of what it left out is printed at the bottom of the file.
Email it to saifsiddiqui2409@gmail.com with a sentence about what you expected and what happened instead. That sentence is genuinely the most useful part.
Housekeeping
Quit OreoNotch, then drag it from Applications to the Trash. That's the whole thing — it installs nothing outside its own bundle, no daemon, no kernel extension, no login item you have to hunt for.
Its settings and local data live in
~/Library/Application Support/Oreo and
~/Library/Preferences/app.ziyarex.notch.plist, if you want them
gone too. To-dos and notes you synced stay in your iCloud until you delete
them from a Mac that still has OreoNotch on it.
There is no trial, so the refund is the safety net and it is meant to be taken seriously: if OreoNotch isn’t for you, write within 30 days and you’ll get your money back without an argument. No form, no reason required, and you keep whatever you set up. The working notch on the front page is there so you can try the real thing before any of that comes up.