We have downloaded Minecraft on an existing account (reinstall after systems issues). When opening Minecraft there is an error message "Minecraft Launcher unexpectedly closed"
Process: launcher [1054]
Path: /Applications/Minecraft.app/Contents/MacOS/launcher
Identifier: com.mojang.intdev.minecraftlauncher
Version: 1267 (1)
Code Type: X86-64 (Native)
Parent Process: launchd [134]
User ID: 502

Date/Time: 2017-04-29 15:02:41.253 +0200
OS Version: Mac OS X 10.8.5 (12F2560)
Report Version: 10

Interval Since Last Report: 349444 sec
Crashes Since Last Report: 90
Per-App Interval Since Last Report: 21 sec
Per-App Crashes Since Last Report: 6
Anonymous UUID: 2A03EEB2-955A-DB4B-5139-90CD0ACBA9FF

Crashed Thread: 0 CrBrowserMain Dispatch queue: com.apple.main-thread

Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000040

VM Regions Near 0x40:
-->
__TEXT 000000010e3db000-000000010e49c000 [ 772K] r-x/rwx SM=COW /Applications/Minecraft.app/Contents/MacOS/launcher

Thread 0 Crashed:: CrBrowserMain Dispatch queue: com.apple.main-thread
0 libdispatch.dylib 0x000000011a175d17 _dispatch_barrier_async_f_slow + 50
1 org.chromium.ContentShell.framework 0x0000000111cac6eb 0x1106da000 + 22882027
2 org.chromium.ContentShell.framework 0x00000001110b32dc 0x1106da000 + 10326748
3 org.chromium.ContentShell.framework 0x00000001113a3580 0x1106da000 + 13407616
4 org.chromium.ContentShell.framework 0x00000001110b37b3 0x1106da000 + 10327987
5 org.chromium.ContentShell.framework 0x00000001110b784a 0x1106da000 + 10344522
6 org.chromium.ContentShell.framework 0x0000000111ae034d 0x1106da000 + 20996941
7 org.chromium.ContentShell.framework 0x0000000111a57fd8 0x1106da000 + 20439000
8 org.chromium.ContentShell.framework 0x0000000111a589ca 0x1106da000 + 20441546
9 org.chromium.ContentShell.framework 0x0000000111a7ef54 0x1106da000 + 20598612
10 org.chromium.ContentShell.framework 0x0000000111a7ed34 0x1106da000 + 20598068
11 org.chromium.ContentShell.framework 0x00000001106dc774 cef_initialize + 276
12 0x000000010e61227a CefInitialize(CefMainArgs const&, CefStructBase<CefSettingsTraits> const&, CefRefPtr<CefApp>, void*) + 154
13 0x000000010e5cbfe7 RunLauncher + 1655
14 com.mojang.intdev.minecraftlauncher 0x000000010e3e4426 main + 6134
15 libdyld.dylib 0x000000011a1b07e1 start + 1

Thread 1:: Dispatch queue: com.apple.libdispatch-manager
0 libsystem_kernel.dylib 0x000000011a394d16 kevent + 10
1 libdispatch.dylib 0x000000011a177dea _dispatch_mgr_invoke + 883
2 libdispatch.dylib 0x000000011a1779ee _dispatch_mgr_thread + 54

Thread 2:
0 libsystem_kernel.dylib 0x000000011a3946d6 __workq_kernreturn + 10
1 libsystem_c.dylib 0x000000011a222f1c _pthread_workq_return + 25
2 libsystem_c.dylib 0x000000011a222ce3 _pthread_wqthread + 412
3 libsystem_c.dylib 0x000000011a20d191 start_wqthread + 13

Thread 3:
0 libsystem_c.dylib 0x000000011a20d184 start_wqthread + 0

Thread 4:
0 libsystem_kernel.dylib 0x000000011a3946d6 __workq_kernreturn + 10
1 libsystem_c.dylib 0x000000011a222f1c _pthread_workq_return + 25
2 libsystem_c.dylib 0x000000011a222ce3 _pthread_wqthread + 412
3 libsystem_c.dylib 0x000000011a20d191 start_wqthread + 13

Thread 5:: com.apple.NSURLConnectionLoader
0 libsystem_kernel.dylib 0x000000011a392686 mach_msg_trap + 10
1 libsystem_kernel.dylib 0x000000011a391c42 mach_msg + 70
2 com.apple.CoreFoundation 0x0000000110280233 __CFRunLoopServiceMachPort + 195
3 com.apple.CoreFoundation 0x0000000110285916 __CFRunLoopRun + 1078
4 com.apple.CoreFoundation 0x00000001102850e2 CFRunLoopRunSpecific + 290
5 com.apple.Foundation 0x000000010e8f3526 +[NSURLConnection(Loader) _resourceLoadLoop:] + 356
6 com.apple.Foundation 0x000000010e951532 _NSThreadmain_ + 1345
7 libsystem_c.dylib 0x000000011a220772 _pthread_start + 327
8 libsystem_c.dylib 0x000000011a20d1a1 thread_start + 13

Thread 6:
0 libsystem_kernel.dylib 0x000000011a3946d6 __workq_kernreturn + 10
1 libsystem_c.dylib 0x000000011a222f1c _pthread_workq_return + 25
2 libsystem_c.dylib 0x000000011a222ce3 _pthread_wqthread + 412
3 libsystem_c.dylib 0x000000011a20d191 start_wqthread + 13

Thread 7:
0 libsystem_kernel.dylib 0x000000011a3946d6 __workq_kernreturn + 10
1 libsystem_c.dylib 0x000000011a222f1c _pthread_workq_return + 25
2 libsystem_c.dylib 0x000000011a222ce3 _pthread_wqthread + 412
3 libsystem_c.dylib 0x000000011a20d191 start_wqthread + 13

Thread 8:: com.apple.CFSocket.private
0 libsystem_kernel.dylib 0x000000011a394322 __select + 10
1 com.apple.CoreFoundation 0x00000001102c4f46 __CFSocketManager + 1302
2 libsystem_c.dylib 0x000000011a220772 _pthread_start + 327
3 libsystem_c.dylib 0x000000011a20d1a1 thread_start + 13

Thread 9:: NetworkConfigWatcher
0 libsystem_kernel.dylib 0x000000011a3926c2 semaphore_wait_trap + 10
1 libdispatch.dylib 0x000000011a178486 _dispatch_semaphore_wait_slow + 241
2 libxpc.dylib 0x000000011a450e1f xpc_connection_send_message_with_reply_sync + 127
3 com.apple.SystemConfiguration 0x00000001177f98e0 _reach_server_target_add + 516
4 com.apple.SystemConfiguration 0x00000001177f96bc __SCNetworkReachabilityServer_targetAdd + 32
5 com.apple.SystemConfiguration 0x00000001177ca117 __SCNetworkReachabilityGetFlags + 293
6 com.apple.SystemConfiguration 0x00000001177c9f68 SCNetworkReachabilityGetFlags + 241
7 org.chromium.ContentShell.framework 0x00000001124edb38 0x1106da000 + 31537976
8 org.chromium.ContentShell.framework 0x00000001124ee391 0x1106da000 + 31540113
9 org.chromium.ContentShell.framework 0x0000000111cec9fb 0x1106da000 + 23144955
10 org.chromium.ContentShell.framework 0x0000000111ce8ca7 0x1106da000 + 23129255
11 libsystem_c.dylib 0x000000011a220772 _pthread_start + 327
12 libsystem_c.dylib 0x000000011a20d1a1 thread_start + 13

Thread 10:
0 org.chromium.ContentShell.framework 0x0000000111ced567 0x1106da000 + 23147879
1 org.chromium.ContentShell.framework 0x0000000111cecde1 0x1106da000 + 23145953
2 org.chromium.ContentShell.framework 0x0000000111ce8c9f 0x1106da000 + 23129247
3 libsystem_c.dylib 0x000000011a220772 _pthread_start + 327
4 libsystem_c.dylib 0x000000011a20d1a1 thread_start + 13

Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x00007fb1a9100140 rbx: 0x0000000000000000 rcx: 0x00007fb1a9100140 rdx: 0x0000000000000001
rdi: 0x00007fb1a9100180 rsi: 0x0000000000000000 rbp: 0x00007fff51821550 rsp: 0x00007fff51821530
r8: 0x0000000120c86800 r9: 0x0000000000000001 r10: 0x000000011a191660 r11: 0x00007fb1a9100140
r12: 0x00007fff518215d8 r13: 0x00007fff51821680 r14: 0x000000011a178153 r15: 0x00007fb1a90229e0
rip: 0x000000011a175d17 rfl: 0x0000000000010202 cr2: 0x0000000000000040
Logical CPU: 3

Binary Images:
0x10e3db000 - 0x10e49bff7 +com.mojang.intdev.minecraftlauncher (1267 - 1) <7E3DA879-B4BA-369F-BBFD-EB62C97FA163> /Applications/Minecraft.app/Contents/MacOS/launcher
0x10e4d8000 - 0x10e6b4ff7 + (??? - ???) <A304722B-4C80-3677-8AA3-40FB0F003FEB> /Applications/Minecraft.app/Contents/Frameworks/launcher.framework/launcher
0x10e7f3000 - 0x10e85bff7 libc+.1.dylib (65.1) <E5A0C88E-0837-3015-A987-F8C5A0D35DD6> /usr/lib/libc+.1.dylib
0x10e8bb000 - 0x10ec1afff com.apple.Foundation (6.8 - 945.19) <C98E55BA-553B-314B-B056-849FFB20C220>