If several people need to edit the same workbook, choose the app that fits your collaborators’ existing tools and the file’s requirements. Use Numbers when the group can work from an iCloud shared spreadsheet and values a simple Mac-centered workflow. Choose Excel when the workbook must remain an Excel file or the group already shares files through Microsoft 365. In either case, confirm the storage, account, app-version, and access requirements before inviting people.

Start with the team’s file and cloud setup

Ask two questions first: Which app can everyone use, and where is the workbook expected to live? Numbers collaboration saves the shared spreadsheet in iCloud. The owner needs an Apple Account and iCloud Drive; access can be limited to invited people or set to anyone with the link, depending on the sharing settings. Apple also documents Numbers collaboration through Box when the document is stored there. Apple’s Numbers collaboration overview

Excel co-authoring requires the workbook to be stored in OneDrive, OneDrive for Business, or a SharePoint Online library. Excel for Microsoft 365 on Mac requires a Microsoft 365 subscription, a current supported app, and a supported workbook format: .xlsx, .xlsm, or .xlsb. Co-authoring does not work for local Mac folders, SMB/server paths, Box, Dropbox, Google Drive, or SharePoint on-premises locations, according to Microsoft. Microsoft’s co-authoring requirements Microsoft’s locked-file guidance

That makes the decision concrete: if your team has already standardized on Microsoft storage and Excel formats, use Excel. If the group is comfortable using iCloud and the workbook is new or uncomplicated, Numbers may be a natural fit. Don’t assume a file synchronized through a third-party cloud drive will support Excel’s live co-authoring; Microsoft lists those locations as unsupported for that feature.

Choose Numbers when iCloud sharing fits

On your Mac, open the spreadsheet in Numbers and make sure it is saved in iCloud Drive. Click Share in the toolbar, set who can access the file and whether they can edit, then invite collaborators or copy the link. Invitees open the shared file in Numbers on Mac or, where supported, Numbers for iCloud in a browser. Apple says shared edits appear in real time, but not all Numbers features are available in shared spreadsheets. Check compatibility if the workbook depends on a specialized feature. Apple’s Mac collaboration instructions

Check collaborator devices before choosing this route. Apple’s current guidance specifies macOS 26 and Numbers 15.4 or later for Mac app collaboration, or Numbers for iCloud in a supported browser on macOS 14 or later or Windows. Requirements can change with app releases, so verify the current compatibility guidance for the devices in your group. Apple’s Numbers collaboration requirements

Choose Excel when the workbook needs Excel compatibility

If collaborators expect an Excel workbook, formulas, or an established Microsoft 365 workflow, keep the working file in Excel. Save it to OneDrive or SharePoint Online, open it in Excel for Mac, select Share, invite people, and check that AutoSave is on. Microsoft says co-authors can see edits as they work; version history in Excel for Mac is available through File > Restore > Browse Version History. Microsoft’s Excel for Mac co-authoring instructions

Before sharing an existing workbook, check its file format and ask whether every collaborator has a supported version. Microsoft warns that one person opening the workbook in an unsupported Excel version can cause a locked-file problem for everyone. If teammates cannot use the desktop app, Excel for the web is a documented co-authoring option. Microsoft’s troubleshooting guidance

If someone sends you a Numbers workbook

Numbers can export a copy in Microsoft Excel format: with the file open, choose Share > Export and Send, then select Excel. This sends or exports a copy; it does not make the original Numbers spreadsheet an Excel co-authored workbook. If the team needs to work together on the Excel version, store that exported workbook in a supported Microsoft location and share it from there. Check the resulting file for any layout or feature differences before making it the team’s working copy. Apple’s export instructions for Numbers on Mac

A quick decision

Choose Numbers if the collaborators can access the shared spreadsheet through iCloud, the current device requirements work for everyone, and the workbook’s features suit Numbers. Choose Excel if the group needs Excel file compatibility or already uses OneDrive or SharePoint Online, and everyone can meet Excel’s co-authoring requirements. If neither setup works for the whole group, settle the storage and app requirements before editing begins; exchanging separate copies can leave people working on different versions.

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