M5 Networking Issues
Stuart Breckenridge
April 15, 2026
I've been having a strange issue with my new M5 MacBook Pro and GitHub: at random intervals, my MacBook cannot connect to GitHub. Well, that's not strictly true: Safari can't connect to GitHub, Git Tower can't push or pull, but Chrome has no issues.
Using dns-sd -G v4 github.com to see what's happening over time:
Timestamp
A/R
Flags
IF
Hostname
Address
TTL
Note
19:46:30.769
Add
2
0
github.com.
20.205.243.166
15
19:55:16.874
Rmv
0
0
github.com.
20.205.243.166
0
19:55:16.885
Add
2
0
github.com.
20.205.243.166
63
20:01:42.237
Add
2
0
github.com.
0.0.0.0
77
No Such Record
20:01:48.800
Rmv
0
0
github.com.
20.205.243.166
0
20:10:18.607
Add
2
0
github.com.
20.205.243.166
60
20:21:43.313
Add
2
0
github.com.
0.0.0.0
77
No Such Record
20:21:49.456
Rmv
0
0
github.com.
20.205.243.166
0
20:21:49.508
Rmv
0
0
github.com.
20.205.243.166
0
20:22:57.954
Add
2
0
github.com.
20.205.243.166
24
20:23:50.255
Rmv
0
0
github.com.
20.205.243.166
0
20:23:50.267
Add
2
0
github.com.
20.205.243.166
60
20:29:05.686
Add
2
0
github.com.
0.0.0.0
77
No Such Record
20:29:13.694
Rmv
0
0
github.com.
20.205.243.166
0
20:29:13.705
Add
2
0
github.com.
20.205.243.166
68
20:37:31.780
Rmv
1
0
github.com.
20.205.243.166
0
20:37:31.780
Add
2
0
github.com.
0.0.0.0
60
No Such Record
During those No Such Record periods, GitHub just refused to work in Safari or Git Tower.
I switched from Cloudflare's 1.1.1.1 service to Quad9, and ever since I've had no issues.
Timestamp
A/R
Flags
IF
Hostname
Address
TTL
Note
20:37:45.321
Add
2
0
github.com.
20.205.243.166
65
21:13:26.595
Rmv
0
0
github.com.
20.205.243.166
0
21:13:26.603
Add
2
0
github.com.
20.205.243.166
15
This wasn't a problem on my M3-series MacBook. I can only assume it's a problem with the M5 and its new networking stack.
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