The build stops before signing: fastlane match cannot pull the private repository from your Remote Mac or CI runner.

Fastest fix: identify whether Git access, the match encryption password, Apple account validation, or the signing identity is failing. Fix that layer only. For unattended builds, use read-only access; do not revoke or recreate certificates just to make a pull error disappear.

This guide is for you if you’re setting up fastlane match on a Remote Mac for the first time. It also covers small teams sharing a signing repository and release maintainers who hit failures after moving to a new Mac or CI environment.

Diagnose the failure layer first

A failed match run does not automatically mean your certificates are broken. The same build can depend on several separate credentials, each used at a different point:

  • Git authentication grants access to the private storage repository. It may use an SSH key, HTTPS credentials, or another configured storage backend.
  • The match encryption password decrypts the signing files after the repository is accessible. Git accepting your credentials does not prove this password is correct.
  • Apple account authorization is a separate check. A problem with account access or validation does not establish that the Git repository is unavailable.
  • The signing identity must be usable by Xcode. A certificate without its corresponding private key is not a complete signing identity.
  • The provisioning profile must fit the target and the signing setup. Downloading a profile does not prove that it matches the app you’re building.

Read the first meaningful failure in the build output, not just the last line. A generic “match failed” summary can hide the useful clue above it. Look for whether the failure occurs during a Git operation, while decrypting files, during Apple account checks, or when Xcode selects an identity.

Before sharing any output, redact repository URLs, account names, hostnames, local paths, tokens, certificate identifiers, and profile identifiers. Don’t paste private key material, passwords, or complete environment dumps into an issue or build log.

Can you confirm the repository is reachable without printing a secret? Run git ls-remote "$MATCH_GIT_URL" from the same user and shell that launches the build. This command shows the references visible in the remote repository; it does not test whether match can decrypt the stored files. See the git ls-remote reference behavior. If the command fails before listing references, troubleshoot Git authentication or repository permissions first.

First run on a Remote Mac

A developer laptop may already have an SSH agent, cached HTTPS credential, or saved login. A newly provisioned Remote Mac may have none of these. The laptop succeeding is useful comparison evidence, but it doesn’t prove the remote build process has the same identity.

Start by running Git checks as the account that actually runs fastlane. A successful test in an administrator’s interactive shell won’t help a build launched under a different macOS user or a service account. Confirm the repository URL and configured transport, then check which key or credential that process can access.

For SSH, test the connection using the same account and key configuration that the build uses. Follow the SSH connection test guidance, then compare its result with git ls-remote. A successful SSH handshake alone may not mean the key has permission to read this particular repository.

For HTTPS, confirm that the credential available to the build has read access to the repository. Don’t switch to a personal account or widen repository visibility as a shortcut. For other configured storage backends, verify that the relevant account is authorized for the exact storage location.

Remote Mac scenario: your local checkout works, but fastlane fails after you move the build to a remote host. First compare the repository URL and Git identity. If git ls-remote fails under the build account, resolve that access problem before investigating match’s encryption password.

New Mac with missing or mismatched credentials

Treat the credential on the Remote Mac as its own deployment identity. Check whether fastlane uses SSH or HTTPS, which account runs the build, and where that account gets its credential. Don’t assume a key installed for your personal login is available to a background process.

With SSH, a deploy key can provide repository-specific access. Confirm that the key is associated with the intended repository and has the minimum permission the workflow needs. Git hosting providers document the permissions and management limits for deploy keys. If you use HTTPS, check the credential’s scope and whether the build environment can retrieve it without echoing it.

Don’t fix an authentication problem by copying a teammate’s personal password to the host, putting the repository in public, or sharing a long-lived token in a project file. Those workarounds make ownership unclear and can expose signing assets to people or processes that don’t need them.

For GitHub Actions, verify that the needed secret is available to the workflow and execution context that runs the job. Secret availability can depend on how a workflow is triggered and configured; review the Actions secrets guidance rather than assuming every job receives every secret. Keep credentials out of printed commands and diagnostic output.

Did Git authenticate but match still report a password or decryption error? Stop changing SSH keys. Repository access and file decryption are separate checks. Move to the match password and secret-injection path.

Repository access works, but decryption fails

Once Git can read the repository, check the value and delivery of the match encryption password. The password must be available to the same process that invokes fastlane. A local shell profile may load it for an interactive session while a CI job or remote service does not.

Check the environment variable name used by your workflow and the value configured in your secret manager. The fastlane match documentation identifies MATCH_PASSWORD as the environment variable used for the encryption password. Treat that as a parameter to verify, not as a value to print. The same documentation describes match’s supported storage and read-only behavior: fastlane match configuration.

Review how the secret reaches the process. Look for a renamed CI secret, a missing workflow mapping, a different shell, or a task runner that strips environment variables. If the secret is present, confirm that the team is using the intended match password for that repository. Don’t put the password in the repository, shell history, a checked-in configuration file, or a build log to make debugging easier.

A successful clone proves that Git can read the repository. It does not prove that match can decrypt the signing files inside it.

If multiple developers maintain the signing repository, agree on a safe process for distributing and rotating the encryption password. Keep its access separate from repository access where your secret-management setup allows it. If someone changes the password or stored material, coordinate that change with every environment that needs to build.

Shared signing repository and CI permissions

A shared repository creates two distinct questions: who needs to read signing assets, and who is allowed to change them? Give those responsibilities different treatment.

  • Developers need only the access required by their local build and release tasks. Don’t grant write access automatically just because someone needs to compile the app.
  • Repository administrators own access policy, authorized storage identities, and coordinated changes to signing materials.
  • CI maintainers should decide which jobs need secrets and whether those jobs need write access. Review workflow triggers and secret availability before exposing signing credentials to a job.

The fastlane documentation recommends using match in readonly mode on CI. Configure the job with readonly: true when it only needs to retrieve existing signing assets. A CI runner should not create or modify shared signing material as a side effect of a routine build. Let an authorized maintainer perform any required write operation through the team’s approved process.

Should a CI job use read-only mode? Yes, when the job’s purpose is to build with existing assets rather than manage them. If the job is expected to create or update signing material, treat that as a controlled maintenance operation. Confirm who approved it, which repository changes it may make, and how the team will recover if the update is wrong.

Read-only access narrows the job’s ability to change shared state, but it doesn’t make secrets harmless. Protect the credentials that grant repository access and decryption. Restrict which workflows can access them, and avoid running secret-bearing jobs in a context you have not reviewed.

Materials downloaded, but Xcode cannot sign

A successful match pull is only evidence that the materials were retrieved. It is not proof that Xcode has a valid signing identity or that the provisioning profile matches the target.

Start with the certificate and its private key. Apple explains that code signing uses a certificate and its associated private key to form a signing identity. Review Apple’s explanation of code-signing certificates. In Keychain Access, or with an appropriate identity check, confirm that the certificate is present and paired with its private key in the keychain used by the build.

Then inspect the provisioning profile. Confirm that it belongs to the intended app identifier and supports the capabilities required by the target. Apple describes the conditions represented by provisioning profiles. If a profile appears stale or mismatched, compare it with the current app configuration and consult Apple’s process for editing, downloading, or deleting profiles.

Keep Apple account validation separate from local signing assets. An account authorization failure may prevent a tool from performing an Apple-side operation. Missing private keys or an unsuitable profile are local signing setup problems. Don’t recreate certificates as a generic response to either type of error.

Before removing or replacing a certificate, profile, or keychain item, identify which targets and build jobs rely on it. Confirm you have an approved recovery path and any required backup. A destructive cleanup can turn one failed build into a wider release outage.

Decision branches for the next action

Use the first branch that matches your evidence:

  • If git ls-remote fails under the build account, fix the repository URL, Git credential, or access permission. Re-run the Git check before changing match settings.
  • If Git can list references but match cannot decrypt files, verify the configured password and its injection into the fastlane process. Don’t rotate SSH keys for a decryption failure.
  • If retrieval works but Apple account validation fails, review the Apple authorization path used by the operation. Don’t treat that as proof the repository or certificate is damaged.
  • If the files download but Xcode cannot find a usable identity, inspect the certificate-private-key pairing and the build’s keychain.
  • If the identity exists but signing still fails, inspect whether the provisioning profile fits the target and required capabilities.
  • If a CI job only consumes existing assets, use read-only match access. If a job must change shared assets, route that write through an authorized maintenance process.

These branches keep the failure evidence tied to the responsible layer. They also reduce the temptation to regenerate certificates when the actual fault is a missing secret or the wrong Git identity.

Layered recovery and build acceptance

After changing a credential or signing setting, verify each boundary in order. Don’t call the release path recovered just because one match command exits successfully.

  • Confirm the runtime identity. Check the macOS user, shell, and workflow step that launch fastlane. Verify that the intended credential source is available there.
  • Confirm repository access. Run the Git check from that context. Record the result without recording a private URL or secret.
  • Confirm password injection. Check that the expected variable is mapped into the process. Do not print its value or store it in a checked-in file.
  • Confirm material retrieval. Run the appropriate match operation with the intended mode. Keep the output private and redact identifiers before sharing a failure excerpt.
  • Confirm the signing identity. Verify the certificate and private key are accessible to the keychain used by the build.
  • Confirm the profile and target. Check that the selected profile corresponds to the app configuration and capabilities being built.
  • Build and archive the real project. Use the same scheme, signing settings, and execution context as the release workflow. Inspect the resulting archive and signing outcome before considering the release path ready.

Keep separate evidence for each checkpoint: Git access passed, decryption passed, identity available, profile matched, and archive completed with the intended signing settings. This makes the next failure easier to localize and prevents a passing retrieval test from being mistaken for a complete publishing test.

If the archive fails, return to the first failing boundary. A keychain selection error is not a reason to change repository permissions. A profile mismatch is not a reason to publish a private repository. Keep changes narrow so you can roll back the exact adjustment that caused a regression.

Choosing a Mac environment for repeatable signing

If your existing setup is a developer laptop used as an occasional build host, it can be convenient and keeps the tools close to your work. But it can also tie signing to one person’s login, depend on that machine being available, and make unattended keychain behavior harder to reproduce. A generic CI runner can centralize builds, yet secret scope, runner access, and signing state still need deliberate maintenance.

If you need Xcode signing builds but don’t have a suitable Mac environment, compare the cost and administration of buying a dedicated Mac with using a Remote Mac for the periods you need. A rented Mac is not the right fit for every case: a stable, sustained workload or a workflow that depends on local physical connections may favor hardware you control. For intermittent release work, a remotely accessible Mac can avoid making a personal laptop the only signing host.

MACCOME offers a Remote Mac service for accessing a hosted Mac environment. If you’re considering that route, review the available Mac rental option against your build schedule and operational requirements. Whatever environment you choose, keep Git authentication, the match password, Apple account authorization, and local signing identity as separate checks. That separation is what lets you repair the failed layer without destabilizing the rest of your release chain.