Skip to content

macOS Mojave: "Could not establish connection to downloader (background process)" #610

@cryo-kronos

Description

@cryo-kronos

Is there already an issue for your problem?

  • I have checked older issues, open and closed

NZBGet Version

v25.2-stable

Platform

macOS

Environment

2012 Mac Mini
macOS Mojave 10.14.6
Intel 64-bit
Python 3.11
Running in Docker: No

Current Behavior

This problem has returned with recent releases including the x64 binary of version 25.2. The last working version for me on Mac OS Mojave is 24.7. I've previously had this issue (#184).

nzbget is not working for me on macOS Mojave. nzbget appears to be running as it shows up in Activity Monitor, but when you try to connect to the web interface, it says "Could not establish connection to downloader (background process)."

Expected Behavior

To run successfully.

Steps To Reproduce

No response

Logs

Process: nzbget [88250]
Path: /Applications/NZBGet.app/Contents/Resources/daemon/usr/local/bin/nzbget
Identifier: nzbget
Version: 0
Code Type: X86-64 (Native)
Parent Process: NZBGet [88229]
Responsible: nzbget [88250]
User ID: 501

Date/Time: 2025-07-04 10:33:12.120 -0700
OS Version: Mac OS X 10.14.6 (18G9323)
Report Version: 12
Anonymous UUID: E737FFE7-1234-6B4E-716F-45D82B8FB5A5

Time Awake Since Boot: 240000 seconds

System Integrity Protection: disabled

Crashed Thread: 0

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY

Termination Reason: DYLD, [0x4] Symbol missing

Application Specific Information:
dyld: launch, loading dependent libraries

Dyld Error Message:
Symbol not found: ___darwin_check_fd_set_overflow
Referenced from: /Applications/NZBGet.app/Contents/Resources/daemon/usr/local/bin/nzbget
Expected in: /usr/lib/libSystem.B.dylib
in /Applications/NZBGet.app/Contents/Resources/daemon/usr/local/bin/nzbget

Binary Images:
0x10d652000 - 0x10dda1fd7 +nzbget (0) <637F9E35-93F1-31DC-8F27-1C4C8DF7E8A7> /Applications/NZBGet.app/Contents/Resources/daemon/usr/local/bin/nzbget
0x115c84000 - 0x115cee70f dyld (655.1.1) <4842B61A-B868-3146-9CA9-5582C4198B25> /usr/lib/dyld
0x7fff7a7cc000 - 0x7fff7a7cdffb libSystem.B.dylib (1252.250.1) /usr/lib/libSystem.B.dylib
0x7fff7aa91000 - 0x7fff7aae4ff7 libc++.1.dylib (400.9.4) <9A60A190-6C34-339F-BB3D-AACE942009A4> /usr/lib/libc++.1.dylib
0x7fff7aae5000 - 0x7fff7aafaff7 libc++abi.dylib (400.17) <38C09CED-9090-3719-90F3-04A2749F5428> /usr/lib/libc++abi.dylib
0x7fff7aafb000 - 0x7fff7aafbff3 libcharset.1.dylib (51.200.6) <2A27E064-314C-359C-93FC-8A9B06206174> /usr/lib/libcharset.1.dylib
0x7fff7b451000 - 0x7fff7b541fff libiconv.2.dylib (51.200.6) <2047C9B7-3F74-3A95-810D-2ED8F0475A99> /usr/lib/libiconv.2.dylib
0x7fff7bad0000 - 0x7fff7bb00fff libncurses.5.4.dylib (53.200.3) <767B4D3D-CF4C-33DF-B282-0CAC013A7AD0> /usr/lib/libncurses.5.4.dylib
0x7fff7c086000 - 0x7fff7c80efd7 libobjc.A.dylib (756.2) <20942D4E-CE6F-376A-8BCD-016F88E4BFD5> /usr/lib/libobjc.A.dylib
0x7fff7d6e3000 - 0x7fff7d6e7ff3 libcache.dylib (81) <1987D1E1-DB11-3291-B12A-EBD55848E02D> /usr/lib/system/libcache.dylib
0x7fff7d6e8000 - 0x7fff7d6f2ff3 libcommonCrypto.dylib (60118.250.2) <1765BB6E-6784-3653-B16B-CB839721DC9A> /usr/lib/system/libcommonCrypto.dylib
0x7fff7d6f3000 - 0x7fff7d6faff7 libcompiler_rt.dylib (63.4) <5212BA7B-B7EA-37B4-AF6E-AC4F507EDFB8> /usr/lib/system/libcompiler_rt.dylib
0x7fff7d6fb000 - 0x7fff7d704ff7 libcopyfile.dylib (146.250.1) <98CD00CD-9B91-3B5C-A9DB-842638050FA8> /usr/lib/system/libcopyfile.dylib
0x7fff7d705000 - 0x7fff7d78afff libcorecrypto.dylib (602.260.3) <9D9C206B-AB19-3257-95D7-59A993845640> /usr/lib/system/libcorecrypto.dylib
0x7fff7d811000 - 0x7fff7d84aff7 libdispatch.dylib (1008.270.1) <97273678-E94C-3C8C-89F6-2E2020F4B43B> /usr/lib/system/libdispatch.dylib
0x7fff7d84b000 - 0x7fff7d877ff7 libdyld.dylib (655.1.1) <002418CC-AD11-3D10-865B-015591D24E6C> /usr/lib/system/libdyld.dylib
0x7fff7d878000 - 0x7fff7d878ffb libkeymgr.dylib (30) <0D0F9CA2-8D5A-3273-8723-59987B5827F2> /usr/lib/system/libkeymgr.dylib
0x7fff7d886000 - 0x7fff7d886ff7 liblaunch.dylib (1336.261.7) <688DAED5-8930-3271-BAEF-68AA48DF5EBB> /usr/lib/system/liblaunch.dylib
0x7fff7d887000 - 0x7fff7d88cfff libmacho.dylib (927.0.3) /usr/lib/system/libmacho.dylib
0x7fff7d88d000 - 0x7fff7d88fff7 libquarantine.dylib (86.270.1) <3F36A3D6-9606-3D90-B520-809BAEF981C3> /usr/lib/system/libquarantine.dylib
0x7fff7d890000 - 0x7fff7d891ff7 libremovefile.dylib (45.200.2) <9FBEB2FF-EEBE-31BC-BCFC-C71F8D0E99B6> /usr/lib/system/libremovefile.dylib
0x7fff7d892000 - 0x7fff7d8a9ff3 libsystem_asl.dylib (356.200.4) /usr/lib/system/libsystem_asl.dylib
0x7fff7d8aa000 - 0x7fff7d8aaff7 libsystem_blocks.dylib (73) /usr/lib/system/libsystem_blocks.dylib
0x7fff7d8ab000 - 0x7fff7d932fff libsystem_c.dylib (1272.250.3) <6016EDA1-440B-34D7-A232-686CD7FBEE90> /usr/lib/system/libsystem_c.dylib
0x7fff7d933000 - 0x7fff7d936ffb libsystem_configuration.dylib (963.270.4) <22D75BE2-9672-337A-9BA5-878D69DAB93D> /usr/lib/system/libsystem_configuration.dylib
0x7fff7d937000 - 0x7fff7d93aff7 libsystem_coreservices.dylib (66.1) /usr/lib/system/libsystem_coreservices.dylib
0x7fff7d93b000 - 0x7fff7d941fff libsystem_darwin.dylib (1272.250.3) /usr/lib/system/libsystem_darwin.dylib
0x7fff7d942000 - 0x7fff7d948ffb libsystem_dnssd.dylib (878.270.3) /usr/lib/system/libsystem_dnssd.dylib
0x7fff7d949000 - 0x7fff7d994ffb libsystem_info.dylib (517.200.9) /usr/lib/system/libsystem_info.dylib
0x7fff7d995000 - 0x7fff7d9bdff7 libsystem_kernel.dylib (4903.278.70) <35EE704F-F9B6-3531-B312-E45CFA2A8743> /usr/lib/system/libsystem_kernel.dylib
0x7fff7d9be000 - 0x7fff7da09ff7 libsystem_m.dylib (3158.200.7) /usr/lib/system/libsystem_m.dylib
0x7fff7da0a000 - 0x7fff7da34fff libsystem_malloc.dylib (166.270.1) <011F3AD0-8E6A-3A89-AE64-6E5F6840F30A> /usr/lib/system/libsystem_malloc.dylib
0x7fff7da35000 - 0x7fff7da3fff7 libsystem_networkextension.dylib (767.250.2) /usr/lib/system/libsystem_networkextension.dylib
0x7fff7da40000 - 0x7fff7da47fff libsystem_notify.dylib (172.200.21) <145B5CFC-CF73-33CE-BD3D-E8DDE268FFDE> /usr/lib/system/libsystem_notify.dylib
0x7fff7da48000 - 0x7fff7da51fef libsystem_platform.dylib (177.270.1) <9D1FE5E4-EB7D-3B3F-A8D1-A96D9CF1348C> /usr/lib/system/libsystem_platform.dylib
0x7fff7da52000 - 0x7fff7da5cff7 libsystem_pthread.dylib (330.250.2) <2D5C08FF-484F-3D59-9132-CE1DCB3F76D7> /usr/lib/system/libsystem_pthread.dylib
0x7fff7da5d000 - 0x7fff7da60ff7 libsystem_sandbox.dylib (851.270.6) <390BE353-BC0C-3E4C-9167-0D973F0DD822> /usr/lib/system/libsystem_sandbox.dylib
0x7fff7da61000 - 0x7fff7da63ff3 libsystem_secinit.dylib (30.260.2) /usr/lib/system/libsystem_secinit.dylib
0x7fff7da64000 - 0x7fff7da6bff3 libsystem_symptoms.dylib (820.267.2) <0DA60956-0403-3456-9D6A-11F2DB9E3819> /usr/lib/system/libsystem_symptoms.dylib
0x7fff7da6c000 - 0x7fff7da81ff7 libsystem_trace.dylib (906.260.3) <5B6FAE61-EF5C-381F-B71B-9B6F6428FEE2> /usr/lib/system/libsystem_trace.dylib
0x7fff7da83000 - 0x7fff7da88ffb libunwind.dylib (35.4) <24A97A67-F017-3CFC-B0D0-6BD0224B1336> /usr/lib/system/libunwind.dylib
0x7fff7da89000 - 0x7fff7dab8fff libxpc.dylib (1336.261.7) <404F0E1A-30BC-3CFB-98D3-4A2167CC2AB8> /usr/lib/system/libxpc.dylib

Extra information

No response

Metadata

Metadata

Assignees

Labels

bugSomething isn't working

Type

No type

Projects

No projects

Milestone

No milestone

Relationships

None yet

Development

No branches or pull requests

Issue actions