build(client): update electron README with Rosetta installation instructions

[ohnorobo]

Added instructions for installing Rosetta on M4/M5 Macs.

[ohnorobo]

@jyyi1 I'll need you to actually click "approve" before I can merge.

[fortuna]

Please address the question on why we need Rosetta

[ohnorobo]

The failure was in our windows client build

  ▶ action(client/electron/build_main): 🎉 Success! (6854ms)
    • electron-builder  version=23.6.0 os=25.2.0
    • description is missed in the package.json  appPackageFile=/Users/laplante/Projects/outline-apps/package.json
    • author is missed in the package.json  appPackageFile=/Users/laplante/Projects/outline-apps/package.json
    • packaging       platform=win32 arch=ia32 electron=19.1.9 appOutDir=output/client/electron/build/win-ia32-unpacked
    • downloading     url=https://github.com/electron/electron/releases/download/v19.1.9/electron-v19.1.9-win32-ia32.zip size=84 MB parts=8
    • downloaded      url=https://github.com/electron/electron/releases/download/v19.1.9/electron-v19.1.9-win32-ia32.zip duration=3.277s
    • downloading     url=https://github.com/electron-userland/electron-builder-binaries/releases/download/winCodeSign-2.6.0/winCodeSign-2.6.0.7z size=5.6 MB parts=1
    • downloaded      url=https://github.com/electron-userland/electron-builder-binaries/releases/download/winCodeSign-2.6.0/winCodeSign-2.6.0.7z duration=2.547s
    • downloading     url=https://github.com/electron-userland/electron-builder-binaries/releases/download/wine-4.0.1-mac/wine-4.0.1-mac.7z size=19 MB parts=3
    • downloaded      url=https://github.com/electron-userland/electron-builder-binaries/releases/download/wine-4.0.1-mac/wine-4.0.1-mac.7z duration=2.594s
    ⨯ cannot execute  cause=fork/exec /Users/laplante/Library/Caches/electron-builder/wine/wine-4.0.1-mac/bin/wine64: bad CPU type in executable
                      command=/Users/laplante/Library/Caches/electron-builder/wine/wine-4.0.1-mac/bin/wine64 /Users/laplante/Library/Caches/electron-builder/winCodeSign/winCodeSign-2.6.0/rcedit-x64.exe /Users/laplante/Projects/outline-apps/output/client/electron/build/win-ia32-unpacked/Outline.exe --set-version-string FileDescription Outline --set-version-string ProductName Outline --set-version-string LegalCopyright 'Copyright © 2026 Outline' --set-file-version 0.0.0-debug --set-product-version 0.0.0.0 --set-version-string InternalName Outline --set-version-string OriginalFilename '' --set-icon /Users/laplante/Projects/outline-apps/client/electron/icons/win/icon.ico

electron-builder is apparently using an old intel version of wine to do some code signing for the .exe

I just wanted to add a few lines to the readme to save some future developer from having to debug the same issue again to get the build working. I don't think it's really worth digging into the internals of our electron build to resolve a build issue that otherwise has an simple workaround.

[jyyi1]

electron-builder is apparently using an old intel version of wine to do some code signing for the .exe

I just wanted to add a few lines to the readme to save some future developer from having to debug the same issue again to get the build working. I don't think it's really worth digging into the internals of our electron build to resolve a build issue that otherwise has an simple workaround.

Yes, I can confirm Rosetta is installed on my machine (though I didn't explicitly install it before); maybe it's auto-installed by Google.

> pkgutil --pkg-info com.apple.pkg.RosettaUpdateAuto 

package-id: com.apple.pkg.RosettaUpdateAuto
version: 1.0.0.0.1.1763815964
volume: /
location: /
install-time: 1766174004

[ohnorobo]

Updated the readme further to indicate exactly which build step requires rosetta.

Added more info to the readme indicating this is required for wine usage in our windows build.