ISO version reporting

Mount or open the ISO

In Windows 10 / 11, right-click → Mount.

You’ll see a virtual drive, e.g. D:\.

Check Sources\install.wim (or .esd) with DISM

dism /Get-WimInfo /WimFile:D:\sources\install.wim

or

dism /Get-WimInfo /WimFile:D:\sources\install.esd

This will list all the images inside (editions, indexes, versions, build numbers).
→ That tells you what editions (Standard, Datacenter, etc.) and builds are included.
(Dell KB also describes this method) 
Dell

Check setup.exe file metadata

In the mounted ISO, find setup.exe.

Right-click → Properties → Details tab.

It often shows the file version and product version which hint the Windows version/build.
(This trick is often suggested in “How to find Windows version from ISO” guides) 
AddictiveTips

Check sources\idwbinfo.txt (or similar metadata files)

Some Windows ISOs include metadata .txt files that contain edition flags, splits, etc.

For example, older guides mention idwbinfo.txt in ISO metadata. 
Super User
+1

Look at folder structure and file names

Sometimes the ISO filename includes the version / build (e.g. Windows_Server_2025_Datacenter_x64.iso).

Also check if there’s install.swm (split WIM) or .esd (compressed) etc.

 Regarding “convincing Boot Camp that the ISO is Windows 10”

Boot Camp typically checks an ISO for being a supported Windows edition (like Windows 10) before proceeding. If you use a Windows Server ISO, Boot Camp might reject it because it’s not recognized as “Windows 10 / 64-bit client OS”.

Possible approaches (risky / hacky) include:

Modify Boot Camp’s internal checks
Some users have modified info.plist inside Boot Camp Assistant to accept different models or ISO identifiers. But newer macOS versions may block such modifications (via System Integrity Protection).
See user reports about editing Boot Camp’s supported models list. 
Super User
+1

Use a “Windows 10–like” ISO wrapper
Trick Boot Camp by using a Windows 8 or 10 ISO initially so the check passes, then swap in your custom install media. There are anecdotal methods doing exactly that. 
Super User
+1

Split large files
Boot Camp’s USB/ISO process can fail if the install.wim is too large (especially with FAT32 constraints). A common workaround is to split the WIM (install.swm) so all files are <4GB. This ensures the file system and copying logic doesn’t break. 
Twocanoes Software

Rebuild a custom ISO
After identifying the version from the install.wim, you could rebuild a custom ISO, renaming or adjusting metadata so that Boot Camp sees it as a Windows 10 ISO. But that’s fragile and unsupported.