I was trying to say that I skipped versions and upgraded from high sierra to 
big sur. As to the version, is it 10.16 or 11? System profiler says this:

System Software Overview:

  System Version:       macOS 11.6.7 (20G630)
  Kernel Version:       Darwin 20.6.0
  Boot Volume:  Macintosh HD
  Boot Mode:    Normal
  Computer Name:        brethen-air
  User Name:    Mark Brethen (marbre)
  Secure Virtual Memory:        Enabled
  System Integrity Protection:  Enabled
  Time since boot:      10 days 18:45

Mark Brethen
mark.bret...@gmail.com



> On Jul 15, 2022, at 9:23 AM, Chris Jones <jon...@hep.phy.cam.ac.uk> wrote:
> 
> 
> 
> On 15/07/2022 3:20 pm, Mark Brethen wrote:
>> I have big sur installed (In the ‘About This Mac’ it lists ‘Version11.6.7')
> 
> Sorry but you are being damn confusing. Why did you then mention 'High 
> Sierra' as your OS below ????
> 
> If you truly do have macOS11 installed, fully up to date, then I am very 
> surprised you are seeing SSL issues.... can anyone else on this OS confirm if 
> they see the same issue...
> 
>> Mark Brethen
>> mark.bret...@gmail.com
>>> On Jul 15, 2022, at 9:14 AM, Chris Jones <jon...@hep.phy.cam.ac.uk> wrote:
>>> 
>>> 
>>> 
>>> On 15/07/2022 3:08 pm, Mark Brethen wrote:
>>>> ~ $ /usr/bin/curl -L -v -o tetgen1.5.1.tar.gz 
>>>> https://wias-berlin.de/software/tetgen/1.5/src/tetgen1.5.1.tar.gz 
>>>> <https://wias-berlin.de/software/tetgen/1.5/src/tetgen1.5.1.tar.gz>
>>>>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  
>>>> Current
>>>>                                  Dload  Upload   Total   Spent    Left  
>>>> Speed
>>>>   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--   
>>>>   0*   Trying 62.141.177.111...
>>>> * TCP_NODELAY set
>>>> * Connected to wias-berlin.de <http://wias-berlin.de> (62.141.177.111) 
>>>> port 443 (#0)
>>>> * ALPN, offering h2
>>>> * ALPN, offering http/1.1
>>>> * successfully set certificate verify locations:
>>>> *   CAfile: /etc/ssl/cert.pem
>>>>   CApath: none
>>>> * TLSv1.2 (OUT), TLS handshake, Client hello (1):
>>>> } [228 bytes data]
>>>> * TLSv1.2 (IN), TLS handshake, Server hello (2):
>>>> { [59 bytes data]
>>>> * TLSv1.2 (IN), TLS handshake, Certificate (11):
>>>> { [6122 bytes data]
>>>> * TLSv1.2 (IN), TLS alert, handshake failure (552):
>>>> { [2 bytes data]
>>>> * error:14008410:SSL routines:CONNECT_CR_KEY_EXCH:sslv3 alert handshake 
>>>> failure
>>>>   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--   
>>>>   0
>>>> * Closing connection 0
>>>> curl: (35) error:14008410:SSL routines:CONNECT_CR_KEY_EXCH:sslv3 alert 
>>>> handshake failure
>>>> Other than updating the system from High Sierra, nothing else. It sounds 
>>>> like I may need to update my certificates?
>>> 
>>> Oh.... You said you where on macOS 11... I guess that was incorrect and you 
>>> really mean OSX 10.11 or.... what ? High Sierra is OSX 10.13 ... Please try 
>>> and be precise in your OS version as in this case it really makes a 
>>> difference...
>>> 
>>> So, assuming you are on 10.11, or 10.13... That OS is indeed old and known 
>>> to have SSL issues. The best solution is indeed to upgrade to a newer OS 
>>> (for many many reasons...)
>>> 

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