You can write and test a Flutter iOS app on Windows or Linux, but the iOS build itself needs macOS. Here is what works without a Mac, what does not, and a GitHub Actions workflow we ran that builds the iOS app for you.
simctl not found, or simctl: No such file or directory. Two different problems print these errors on a Mac with Xcode. Here is how to tell which one you have, and the commands that fix each.
When the rack is full, the sale should still go through. Here is how we let a customer buy a machine that is not online yet, start the clock only when it is live, and never charge for the wait.
How we put a leased Mac's screen in a browser tab without opening a single inbound port on our network: noVNC, websockify, a pull-model token, and a Tailscale Funnel doing the TLS.
macOS will not let a script grant screen recording. On one Mac you toggle a switch by hand. Across a fleet you push a PPPC configuration profile, and it is the one setup step you cannot automate any other way.
We manage our Tailscale access rules from code. One stale API key pointed at an old tailnet, so the tooling read a different ACL, reported a false outage, and wrote three customers' access into a network they were not on.
MacStadium's M2 Mac mini is $109 a month. A dedicated MacinCloud M1 is $114.99, and its $39 plan is a shared Mac with no admin rights. What each plan gives you, and which fits iOS CI or an agent Mac.
We built the Wikipedia iOS app on a dedicated M6 Mac mini and on GitHub's standard macOS 26 runner, same Xcode, same script. Clean builds were 53 percent faster on the M6, and a typical CI job went from 4.5 minutes to under 30 seconds.
A leased Mac has to come back from a reboot logged in, with no keyboard attached. How headless auto-login works on Apple Silicon, and the four things that silently stop it. One is new: macOS 27 can latch lastLoginPanic on every boot.
Screen Sharing can run, accept your password, and still serve a completely black screen. The cause is a permission macOS will not let a script grant, and every obvious way to test for it lies to you.
The macOS license permits leasing a whole Mac for developer services. Here is Section 3 word for word, the four conditions, the notice Apple asks for, and what happened when we sent it.
A check whose output is the same when the system is broken is not evidence. Five real examples from running a Mac fleet, what each one hid, and the one rule that would have caught all of them.
A control-plane outage made every Mac in the fleet look unreachable, and the recovery automation logged a power cycle for all four. Why 'I cannot see it' must never share a code path with 'it is dead'.
Session mode caps a Supabase project at 15 connections, which a few warm serverless functions exhaust. The right pooler port and username, why the direct host does not resolve from Vercel, and the pool size for each mode.
A dedicated Mac on business fiber has an outbound address that geolocation databases classify as not hosting. For QA, market research and anything that meets an anti-bot check, that matters more than a rack.
A second-hand M4 mini turned up on macOS 15 when the fleet runs Xcode 26.6, which needs 26.2. How to read the real minimum, why Software Update hides older releases, and what to check before paying for a used Mac.