back to article Apple's latest macOS Catalina update mysteriously borks SSH for some unlucky fans. What could be the cause?

Apple's latest update to macOS Catalina appears to have broken SSH for some users. Developer Tyler Hall published a blog post on Monday detailing the issue, but removed it after his writeup got noticed. The issue is that under Apple's macOS 10.15.4 update, released on March 24, trying to open a SSH connection to a port …

  1. John Robson Silver badge

    They are perfectly transparent...

    You can't see anything that's going on inside.... light just passes through unaffected.

    1. quxinot Silver badge

      Re: They are perfectly transparent...

      Dark matter also doesn't ineract with light, and has enough gravity to suck.....


  2. Anonymous Coward
    Anonymous Coward

    If os 10x whatever version it is this week

    is so rubbish, just don't use it. Simple.

    On the other hand, if you can make a "never be a millionaire but way more than comfortable" living out of it as we are doing, then just shut the fuck up.

    Besides, Ives has been fucked off. It will get better.

    Cheers… Ishy

  3. Anonymous Coward
    Anonymous Coward

    Have you checked 14 boxes under system preferences...

    and entered a local admin password 4 times? Seriously, Catalina in on course to be a skipper, and Mojave was no rock star.

    1. Charlie Clark Silver badge

      Re: Have you checked 14 boxes under system preferences...

      Can't really remember any of the recent releases that didn't come with a heap of problems but Mojave is just begging to be skipped because it takes away so much and brings so little to anyone who isn't obsessed with I-Toys.

      1. williamt

        Re: Have you checked 14 boxes under system preferences...

        Well fortunately I'm still running High Sierra… hoping that a small bonus of Covid-19 might be the release date of 10.16 gets pushed back to allow a few more months of security updates for my version before I have to decide what to do.

        The problem is if you also have to time buying a new Mac right if you want the OS to be as stable as possible - i.e. ideally just before a new version comes out and the old one is still installed on the system.

        1. Charlie Clark Silver badge

          Re: Have you checked 14 boxes under system preferences...

          Will probably be facing that problem soon: current MBP has severely swollen glands (batteries) that will need replacing fairly soon and I will need a backup machine. I think you can downgrade the OS when installing from backup but I guess I'm going to find out when computer says "No!"

          1. Snapper

            Re: Have you checked 14 boxes under system preferences...

            Depends on the exact model of computer you buy. If its been around during the lifetime of your favoured macOS version then you'll probably be OK. Any updates to that model after the macOS is updated usually means you are stuck with the new OS.

        2. Anonymous Coward
          Anonymous Coward

          Re: Have you checked 14 boxes under system preferences...

          Same issue here. My mid-2011 iMac is still going strong but won't progress past High Sierra which, if Apple doesn't change its policy, loses support when MacOS10.16 comes out. Macs don't seem to suffer ageing as bad as Windows machines and mine performs as nicely now as when it was new. Granted, running Windows 10 and Ubuntu VMs concurrently sometimes slows it down with too many programs running, but that's easily manageable by recognising the limitation and only running a VM when I actually need it. Never had a Windows computer when, at 8 years old, I've not wanted an upgrade. With my iMac, I just don't want to change it, so losing High Sierra support will be hard.

          My MBP is only 6 and runs Catalina - that's not used much nowadays (iPads have the power for most needs on the move) - so I'm considering tethering that to the desk and just getting a new monitor...

          1. Charlie Clark Silver badge

            Re: Have you checked 14 boxes under system preferences...

            Yes, SWMBO has my old MBP and, of course, it's still running fine. It's hardly ever on the internet but Apple's upgrade policy is not very user friendly.

  4. Anonymous Coward
    Anonymous Coward


  5. Robert Grant Silver badge

    trying to open a SSH connection to a port greater than 8192 using a server name, rather than an IP address, no longer works – for some users at least. SSH is a Swiss army knife that can be used to securely connect to remote machines to run commands, transfer files and other data, and so on

    Well sure, now I know what SSH is. But what's a port, a server name and an IP address?

    1. David 132 Silver badge

      1) A fortified wine from Portugal.

      2) "Manuel" or "Jeeves".

      3) The full location, including street number and postcode, of a public urinal.


  6. This post has been deleted by its author

  7. Sleep deprived

    You're using the wrong protocol prefix

    It's oops://

  8. Sgt_Oddball Silver badge
    Paris Hilton

    I wonder...

    If you can use SSH with IPoAC and it's possible that the carriers have gotten lost going to ports over 8192?

  9. Wibble

    Catalina; not their best effort

    Catalina's a bit of a mess. Loads of bugs compared with previous versions, especially by the time it reached the 4th update. Problems here include:

    * Crashes - almost Microsoft levels of crashes, generally on waking from sleep

    * Display driver problems - secondary monitors intermittently blank on waking from sleep, flickering hue; incorrect contrast

    * Sleep problems - like won't sleep

    * Airplay problems - unreliable connections

    * Security and other changes means lots of time messing around answering silly "security" popups - very MS like.

    Really not their finest version. That there's SSH problems doesn't surprise. The loss of some 32bit utilities also annoys.

    Stuck with Catalina because a 16" machine depends upon it.

  10. one crazy media

    Why bother

    Some folks are wedded to the past, horse and buggy's, viking ships, MS DoS and Widows 97. Why bother about their useless discoveries and publish and waste time?

    People talking about SSH (90%) of them are not using SSH encryption incorrectly anyway. I talk to developers all day about SSH and TLS, most of them don know the difference between wild-card (snake oil), certificate, domain bound certificate, and believe as long as they choose AES-256 the world is safe and everything is encrypted.

    I am going to have 20th one-hour call today with a developer alleged to be an expert in PKI Design!!!

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