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UCP setup on MAC producing error of the form; "Unrecoverable reconciliation error: unable to launch ucp-reconcile container: Error response from daemon: linux mounts: path /var is mounted on / but it is not a shared or slave mount"

I am trying to setup UCP on my MAC using the following command;

docker container run --rm -it --name ucp -v /var/run/docker.sock:/var/run/docker.sock docker/ucp:3.1.7 install --interactive --debug --pod-cidr 192.168.0.0/24

Getting an error of this form;

{“level”:“info”,“msg”:“Launching ucp-reconcile container with image docker/ucp-agent:3.1.7”,“time”:“2019-05-27T15:21:31Z”}
{“level”:“debug”,“msg”:“Injecting config at /etc/ucp/ucp-internal.json into ucp-reconcile”,“time”:“2019-05-27T15:21:32Z”}
{“level”:“error”,“msg”:“Unrecoverable reconciliation error: unable to launch ucp-reconcile container: Error response from daemon: linux mounts: path /var is mounted on / but it is not a shared or slave mount”,“time”:“2019-05-27T15:21:33Z”}
Reconciliation was unsuccessful
ERRO[0922] Unable to successfully setup local node. Run “docker logs ucp-reconcile” for more details
FATA[0922] waiting for reconciler canceled

Running “docker logs ucp-reconcile” doesn’t appear to help.

First time posting on the forum (so apologies if I’m over redacting the diag info).
System;

{
“date_local”: “2019-05-27 16:43:46.138148847 +0100 BST”,
“date_utc”: “2019-05-27 15:43:46.138148847 +0000 UTC”,
“date_unix”: 1558971826,
“os_arch”: “amd64”,
“os_name”: “darwin”,
“os_variant”: “macOS High Sierra”,
“os_version”: “10.13.6”,
“os_kernel_version”: “17.7.0”,
“os_build_number”: “17G7024”,
“time_boot”: “2019-05-26 07:50:52 +0000 UTC”,
“time_up_seconds”: 114774,
“hypervisor_status”: “PASS: Hypervisor framework works”,
“virt_system”: “”,
“mem_total”: 17179869184,
“mem_free”: 61706240,
“cpu_cores”: 2,
“cpu_threads”: 4,
“cpu_family”: “6”,
“cpu_model”: “61”,
“cpu_stepping”: “4”,
“cpu_name”: “Intel® Core™ i7-5557U CPU @ 3.10GHz”,
“cpu_flags”: [
“FPU”,
“VME”,
“DE”,
“PSE”,
“TSC”,
“MSR”,
“PAE”,
“MCE”,
“CX8”,
“APIC”,
“SEP”,
“MTRR”,
“PGE”,
“MCA”,
“CMOV”,
“PAT”,
“PSE36”,
“CLFSH”,
“DS”,
“ACPI”,
“MMX”,
“FXSR”,
“SSE”,
“SSE2”,
“SS”,
“HTT”,
“TM”,
“PBE”,
“SSE3”,
“PCLMULQDQ”,
“DTES64”,
“MON”,
“DSCPL”,
“VMX”,
“EST”,
“TM2”,
“SSSE3”,
“FMA”,
“CX16”,
“TPR”,
“PDCM”,
“SSE4.1”,
“SSE4.2”,
“x2APIC”,
“MOVBE”,
“POPCNT”,
“AES”,
“PCID”,
“XSAVE”,
“OSXSAVE”,
“SEGLIM64”,
“TSCTMR”,
“AVX1.0”,
“RDRAND”,
“F16C”,
“SMEP”,
“ERMS”,
“RDWRFSGS”,
“TSC_THREAD_OFFSET”,
“BMI1”,
“AVX2”,
“BMI2”,
“INVPCID”,
“SMAP”,
“RDSEED”,
“ADX”,
“IPT”,
“FPU_CSDS”,
“MD_CLEAR”,
“IBRS”,
“STIBP”,
“L1DF”,
“SSBD”,
“SYSCALL”,
“XD”,
“1GBPAGE”,
“EM64T”,
“LAHF”,
“LZCNT”,
“PREFETCHW”,
“RDTSCP”,
“TSCI”
]
}

Docker Info;

{
“id”: “4855D8A3-A153-4D06-ABC3-B7421BBC14C9”,
“date”: “2019-05-27 15:43:45.78766826 +0000 UTC”,
“os”: “macOS 10.13.6”,
“os_label”: “osx/10.13.x”,
“app_version”: “2.0.0.3”,
“app_channel”: “stable”,
“engine_version”: “18.09.2”,
“compose_version”: “1.23.2”,
“kubernetes_version”: “v1.10.11”,
“credhelper_version”: “0.6.0”,
“notary_version”: “0.6.1”,
“vpnkit_version”: “83b469a79cfa7a272057dc41d3d97e7d1f16e4a5”,
“hyperkit_version”: “v0.20180403-17-g3e954c”
}

Any suggestions please?