Install using channel-only on Mac M4 for dotnet 10 fails

[tillig]

When using the dotnet-install.sh on a Mac M4 and only specifying the channel as dotnet 10, the error Failed to resolve the exact version number. comes up due to a missing file at both https://builds.dotnet.microsoft.com/dotnet/Sdk/10/latest.version and https://ci.dot.net/public/Sdk/10/latest.version.

This looks similar to #461 where the aka.ms link resolves to Bing instead of returning a file for https://aka.ms/dotnet/10/dotnet-sdk-osx-arm64.tar.gz.

Verbose logs here:

[09:53] pwsh> bash ~/Downloads/dotnet-install.sh -c 10 --verbose
dotnet-install: Note that the intended use of this script is for Continuous Integration (CI) scenarios, where:
dotnet-install: - The SDK needs to be installed without user interaction and without admin rights.
dotnet-install: - The SDK installation doesn't need to persist across multiple CI runs.
dotnet-install: To set up a development environment or to run apps, use installers rather than this script. Visit https://dotnet.microsoft.com/download to get the installer.

dotnet-install: Calling: machine_has curl
dotnet-install: Calling: calculate_vars
dotnet-install: Calling: get_normalized_architecture_from_architecture <auto>
dotnet-install: Calling: get_machine_architecture
dotnet-install: Normalized architecture: 'arm64'.
dotnet-install: Calling: get_normalized_os
dotnet-install: Calling: get_current_os_name
dotnet-install: Normalized OS: 'osx'.
dotnet-install: Calling: get_normalized_quality
dotnet-install: Normalized quality: ''.
dotnet-install: Calling: get_normalized_channel 10
dotnet-install: Normalized channel: '10'.
dotnet-install: Calling: get_normalized_product
dotnet-install: Normalized product: 'dotnet-sdk'.
dotnet-install: Calling: resolve_installation_path <auto>
dotnet-install: Calling: get_user_install_path
dotnet-install: resolve_installation_path: user_install_path=/Users/travis.illig/.dotnet
dotnet-install: InstallRoot: '/Users/travis.illig/.dotnet'.
dotnet-install: Calling: get_normalized_architecture_for_specific_sdk_version Latest 10 arm64
dotnet-install: Calling: get_current_os_name
dotnet-install: Calling: get_download_link_from_aka_ms
dotnet-install: Retrieving primary payload URL from aka.ms for channel: '10', quality: '', product: 'dotnet-sdk', os: 'osx', architecture: 'arm64'.
dotnet-install: Constructed aka.ms link: 'https://aka.ms/dotnet/10/dotnet-sdk-osx-arm64.tar.gz'.
dotnet-install: Calling: get_http_header https://aka.ms/dotnet/10/dotnet-sdk-osx-arm64.tar.gz true
dotnet-install: Calling: machine_has curl
dotnet-install: Calling: get_http_header_curl https://aka.ms/dotnet/10/dotnet-sdk-osx-arm64.tar.gz true
dotnet-install: Received response: HTTP/1.1 302 Moved Temporarily
Server: Kestrel
Location: https://www.bing.com?ref=aka&shorturl=dotnet/10/dotnet-sdk-osx-arm64.tar.gz
Request-Context: appId=cid-v1:d94c0f68-64bf-4036-8409-a0e761bb7ee1
X-Response-Cache-Status: False
Content-Length: 0
Expires: Wed, 04 Mar 2026 17:54:05 GMT
Cache-Control: max-age=0, no-cache, no-store
Pragma: no-cache
Date: Wed, 04 Mar 2026 17:54:05 GMT
Connection: close
Strict-Transport-Security: max-age=31536000 ; includeSubDomains

HTTP/2 200
content-type: text/html; charset=utf-8
cache-control: private
x-eventid: 69a871bd5c1f4893a6e47cf74ecf3994
useragentreductionoptout: A7kgTC5xdZ2WIVGZEfb1hUoNuvjzOZX3VIV/BA6C18kQOOF50Q0D3oWoAm49k3BQImkujKILc7JmPysWk3CSjwUAAACMeyJvcmlnaW4iOiJodHRwczovL3d3dy5iaW5nLmNvbTo0NDMiLCJmZWF0dXJlIjoiU2VuZEZ1bGxVc2VyQWdlbnRBZnRlclJlZHVjdGlvbiIsImV4cGlyeSI6MTY4NDg4NjM5OSwiaXNTdWJkb21haW4iOnRydWUsImlzVGhpcmRQYXJ0eSI6dHJ1ZX0=
strict-transport-security: max-age=31536000; includeSubDomains; preload
permissions-policy: unload=()
p3p: CP="NON UNI COM NAV STA LOC CURa DEVa PSAa PSDa OUR IND"
x-frame-options: SAMEORIGIN
content-length: 0
date: Wed, 04 Mar 2026 17:54:05 GMT
set-cookie: MUID=18C5E682541A6BBC2423F19055016AFE; domain=.bing.com; expires=Mon, 29-Mar-2027 17:54:05 GMT; path=/; secure; SameSite=None
set-cookie: MUIDB=18C5E682541A6BBC2423F19055016AFE; expires=Mon, 29-Mar-2027 17:54:05 GMT; path=/; HttpOnly
set-cookie: _EDGE_S=F=1&SID=32B20A925A7B6DC618921D805B606CDE; domain=.bing.com; path=/; HttpOnly
set-cookie: _EDGE_V=1; domain=.bing.com; expires=Mon, 29-Mar-2027 17:54:05 GMT; path=/; HttpOnly
set-cookie: SRCHD=AF=NOFORM; domain=.bing.com; expires=Sat, 04-Mar-2028 17:54:05 GMT; path=/
set-cookie: SRCHUID=V=2&GUID=61F59F5693F543F3BAC1F34D84ED1F74&dmnchg=1; domain=.bing.com; expires=Sat, 04-Mar-2028 17:54:05 GMT; path=/
set-cookie: SRCHUSR=DOB=20260304; domain=.bing.com; expires=Sat, 04-Mar-2028 17:54:05 GMT; path=/
set-cookie: SRCHHPGUSR=SRCHLANG=en&IG=B07A4611B3614B4089A6F514104D4029; domain=.bing.com; expires=Sat, 04-Mar-2028 17:54:05 GMT; path=/
set-cookie: _SS=SID=32B20A925A7B6DC618921D805B606CDE; domain=.bing.com; path=/
set-cookie: ULC=; domain=.bing.com; expires=Tue, 03-Mar-2026 17:54:05 GMT; path=/
set-cookie: _HPVN=CS=eyJQbiI6eyJDbiI6MSwiU3QiOjAsIlFzIjowLCJQcm9kIjoiUCJ9LCJTYyI6eyJDbiI6MSwiU3QiOjAsIlFzIjowLCJQcm9kIjoiSCJ9LCJReiI6eyJDbiI6MSwiU3QiOjAsIlFzIjowLCJQcm9kIjoiVCJ9LCJBcCI6dHJ1ZSwiTXV0ZSI6dHJ1ZSwiTGFkIjoiMjAyNi0wMy0wNFQwMDowMDowMFoiLCJJb3RkIjowLCJHd2IiOjAsIlRucyI6MCwiRGZ0IjpudWxsLCJNdnMiOjAsIkZsdCI6MCwiSW1wIjoxLCJUb2JuIjowfQ==; domain=.bing.com; expires=Sat, 04-Mar-2028 17:54:05 GMT; path=/
alt-svc: h3=":443"; ma=93600
x-cdn-traceid: 0.06456768.1772646845.8d2d809
content-security-policy: script-src https: 'strict-dynamic' 'report-sample' 'wasm-unsafe-eval' 'nonce-gD8JmbXC56AI6ePmbMkJKxAxU0x1Ixi3HEuw/Hwtd/w='; base-uri 'self';

dotnet-install: The aka.ms link 'https://aka.ms/dotnet/10/dotnet-sdk-osx-arm64.tar.gz' is not valid: received HTTP code: 302.
dotnet-install: Falling back to latest.version file approach.
dotnet-install: Calling: get_specific_version_from_version https://builds.dotnet.microsoft.com/dotnet 10 arm64 Latest
dotnet-install: Calling: get_version_from_latestversion_file https://builds.dotnet.microsoft.com/dotnet 10 arm64 false
dotnet-install: get_version_from_latestversion_file: latest url: https://builds.dotnet.microsoft.com/dotnet/Sdk/10/latest.version
dotnet-install: Calling: download https://builds.dotnet.microsoft.com/dotnet/Sdk/10/latest.version
dotnet-install: Calling: machine_has curl
dotnet-install: Calling: downloadcurl https://builds.dotnet.microsoft.com/dotnet/Sdk/10/latest.version
dotnet-install: Calling: get_http_header_curl https://builds.dotnet.microsoft.com/dotnet/Sdk/10/latest.version false
dotnet-install: Unable to download https://builds.dotnet.microsoft.com/dotnet/Sdk/10/latest.version. Returned HTTP status code: 404.
dotnet-install: Download failed: https://builds.dotnet.microsoft.com/dotnet/Sdk/10/latest.version
dotnet-install: Failed to resolve the specific version number using feed 'https://builds.dotnet.microsoft.com/dotnet'
dotnet-install: Calling: get_specific_version_from_version https://ci.dot.net/public 10 arm64 Latest
dotnet-install: Calling: get_version_from_latestversion_file https://ci.dot.net/public 10 arm64 false
dotnet-install: get_version_from_latestversion_file: latest url: https://ci.dot.net/public/Sdk/10/latest.version
dotnet-install: Calling: download https://ci.dot.net/public/Sdk/10/latest.version
dotnet-install: Calling: machine_has curl
dotnet-install: Calling: downloadcurl https://ci.dot.net/public/Sdk/10/latest.version
dotnet-install: Calling: get_http_header_curl https://ci.dot.net/public/Sdk/10/latest.version false
dotnet-install: Unable to download https://ci.dot.net/public/Sdk/10/latest.version. Returned HTTP status code: 404.
dotnet-install: Download failed: https://ci.dot.net/public/Sdk/10/latest.version
dotnet-install: Failed to resolve the specific version number using feed 'https://ci.dot.net/public'

Note that I can specify an exact version and things do work - dotnet-install.sh -v 10.0.103 for example works.

[ellahathaway]

Hi @tillig - thanks for the detailed logs!

I believe what you’re running into is that dotnet-install.sh doesn’t support a one-part channel like -c 10.

Per the script’s help text, --channel expects one of:

• STS / LTS, or
• a 2-part version A.B (e.g., 8.0, 9.0), or
• a 3-part SDK band A.B.Cxx (e.g., 10.0.1xx)

So -c 10 won’t resolve to a valid channel and the script ends up attempting to probe .../Sdk/10/latest.version, which (as you found) 404s.

Workaround:

• Try -c 10.0 (or -c 10.0.1xx if you want to pin to a band)

For example:

• bash dotnet-install.sh -c 10.0 --verbose

Since -v 10.0.103 works for you, this aligns with it being a channel parsing/normalization issue rather than a macOS arm64-specific download issue.

I’ve filed #686 to improve/fix the script output when a one-part channel is used.

[tillig]

Oh my goodness, you're absolutely right. It's a "me" problem! I should have seen that. #686 will help a lot. Thanks for your patience and assistance!