Questions tagged [ntp]
The ntp tag has no usage guidance.
36
questions
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AutoSync Time periodically
My Catalina weirdly have drifting time, sometimes 5 minutes, 10 minutes, 19 minutes (in 1-2 hours), today it's drifting 40 minutes (in 4 hours). Is there any brew package/daemon that automatically ...
- 883
2
votes
1
answer
974
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Date is wrong by months when set to automatically
Since a few days my MacBook Air 2020 shows the wrong date when set to "Set date and time automatically".
This is regardless of the chosen NTP server.
When time set manually, querying a NTP ...
- 2,920
5
votes
2
answers
2k
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Are apsd, ntpd, mDNSResponder, trustd, netbiosd necessary for macOS functioning?
I'm seeing 5 processes with network activity ( sending/receiving bytes ). I'm not sure whether these are normal occurrences?
List of processes
apsd
ntpd
mDNSResponder
trustd
netbiosd
I researched a ...
- 53
1
vote
0
answers
311
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`timed`: how to act as NTP server?
[I have two not-really-related questions about timed,
so I'm asking them separately. The other one is
"timed not always working?".]
I just upgraded to High Sierra (yeah, I'm a bit behind the
times), ...
- 163
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1
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4k
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Is it true that iOS devices use a hard coded time.apple.com dns for an ntp server?
I read that the only way to point an IOS device at your own NTP server is to change your dns sever’s record for time.apple.com to point at your NTP server so that when the iOS device requests the time ...
- 1,613
3
votes
2
answers
5k
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How do I enable ntpd to serve ntp clients (using macOS 10.14 Mojave)?
So on macOS High Sierra 10.13, this answer worked fine: How to enable ntpd to server ntp clients (using High Sierra)
Now I am running macOS 10.14 and they have removed both ntpdate and ntpd-wrapper (...
- 41
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1
answer
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Changing time servers in High Sierra
man timed and "hoakley" says that timed still uses /etc/ntp.conf and I see nothing in the launchd plist that selects that or anything else, so I would think that it is either hard-coded or ...
- 4,561
15
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The `ntpdate` command was removed from Mojave. What to use now? [duplicate]
In the latest macOS version (Mojave 10.14 Beta) the ntpdate tool has been removed. What I want to do is to simply restart the computer clock using an NTP server:
sudo ntpdate -u pool.ntp.org
Has ...
- 355
2
votes
2
answers
4k
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How do I enable ntpd to serve ntp clients (using High Sierra)?
I have some raspberry pi computers on a private network which do not have real time clocks and thus cannot keep time accurately after they are shut off. Because they are disconnected from the internet,...
- 827
3
votes
1
answer
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NTP not updating back to system time in macOS
In macOS 10.12.6 , I am trying to forward the clock using the date command.
E.g.: today's date is 25-09-2017 and I am setting it to 27-09-2017. But using ntp I am unable to revert my system time ...
- 151
2
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1
answer
1k
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SNTP timeout after 15 seconds but default is supposed to be 68 sec
Using sntp to query an NTP server times out after just 15 sec.
Stevens-MacBook-Air:~ Steve$ sntp -d time.nist.gov
Starting to read KoD file /var/db/ntp-kod...
sntp sendpkt: Sending packet to 2610:20:...
- 151
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vote
0
answers
64
views
Recover data from disabled iPhone with known passcode [duplicate]
my friend broke his iPhone 4S digitizer in very unhappy way. He didn't have backup or synced computers and he had cellular data turn off.
I successfully replaced digitizer and turn on the iPhone. ...
- 131
2
votes
1
answer
3k
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Is possible to reset the timer on a disabled iPhone without Wi-Fi or Cellular?
After the screen was replaced on my iPhone 4S, I a got "disabled for 24+ millions minutes" text on my screen due to battery being unplugged. Unfortunately I have disabled cellular data and I wasn't ...
- 131
4
votes
1
answer
5k
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How can I force OS X to update its time more regularly?
We have a Mac mini build server running 10.9.5 and sometimes the build fails on the codesign command, which fails because of the timestamp on one of the files. The way we usually "fix" this is to ...
- 141
21
votes
1
answer
45k
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Command-line tool to ask remote server for current date-time
On Mac OS X (such as 10.8 thru 10.11) is there a bundled command-line tool to ask a specific remote NTP time server for the current date-time?
I found ntpdc but this queries the ntpd utility which I ...
- 12k
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1
answer
380
views
How do iPhones acquire date and time?
Do iPhones and iPads with cellular network support NITZ or do they only rely on NTP?
- 7,652
1
vote
1
answer
1k
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How to get exact NTP drift in OS X
I'm trying to get actual NTP drift on Macs connected to a local NTP server.
When reading /var/db/ntp.drift file I get -37.521 which according to PPM to milliseconds conversion gives -3241ms of drift.
...
- 655
3
votes
1
answer
2k
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Time and date won't update on Mac
I have set the time and date to update automatically on my Mac running Snow Leopard, however the time and date do not update. I ran ntpdate -q using time.nist.gov & time.asia.apple.com and receive ...
- 31
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394
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How do I use UTC with NTP?
Looking at:
https://support.apple.com/kb/PH9069
How do I set the clock to use UTC with NTP?
(This is in the context of synchronizing the Mac with the Linux server, both should be using UTC and, ...
- 241
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2
answers
1k
views
How to change NTP server in airport express?
Is it possible to change NTP server in AirportExpress? Is there any other way to control this device than Airpot Utility?
- 11
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5
answers
2k
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How to install the 2014 NTP security fix on 10.6.8 Snow Leopard
For 10.6.8 would it work to open the 10.8 NTP update.dmg with pacifist and put in the new versions of the following 6 files?:
/usr/bin/sntp
/usr/bin/ntp-keygen
/usr/bin/ntpq
/usr/sbin/ntpdc
/...
- 21
10
votes
3
answers
9k
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Disabling NTP on OS X Lion or older
Following a new security vulnerability in the Network Time Protocol software package, Apple has provided a software update for Mountain Lion and newer versions of OS X.
As usual, the older versions ...
- 213
3
votes
2
answers
9k
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Set up NTP server on iOS device
How can I make an iOS device a NTP server ? The reason for this is, the network of devices I have don't have internet connection but are connected via Wifi. So just want to create a device as a server ...
- 31
3
votes
1
answer
5k
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ntpd and incoming connections on OS X client?
I recently received a dialog box on my MacBook Air (10.9.2 Client) asking "Do you want the application “ntpd” to accept incoming network connections?". I have OS X's firewall enabled.
Now, my ...
- 896
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1
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486
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Can't connect to SMB share between two current 10.9.x machines not connected to the internet
In two instances I have have a number of Mac Minis and iMacs that were not connected to the Internet but a local isolated LAN have their SMB:// shares refuse to connect, though they worked days or ...
- 2,517
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0
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170
views
Autokey NTP client?
What's a reasonably short path to getting OS X to be an NTP client of an NTP server, using autokey?
I tried adding the server's public keyfile (iffpar) and the appropriate commands in ntp.conf in the ...
- 306
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vote
2
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3k
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ntpd unable to create socket on en0
I have a mac mini running OS X Server (Mavericks, 10.9.1 - latest Server.app) and I keep getting these error messages in them system logs every few minutes. I am not sure if there is a real problem or ...
- 143
64
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6
answers
82k
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How can I tell if my Mac is keeping the clock updated properly?
I would like to know what the default settings for OS X are in terms of keeping the clock adjusted when I enable automatic time sync in the Date & Time preference.
I do know that the venerable ...
- 231k
6
votes
1
answer
5k
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Clock won't keep time after Mavericks installation
My clock no longer keeps time properly after installation of Mavericks. This problem affects all of my iMacs immediately post-Mavericks, so it's not an issue with a bad battery.
The symptom is: The ...
- 301
22
votes
9
answers
35k
views
How can I keep my system clock in sync under Mavericks?
I have a mid 2011 27" iMac running Mavericks (10.9.1). I updated from Mountain Lion this Fall when Mavericks was released. I never had any problem before with my system clock.
Since installing ...
- 875
19
votes
5
answers
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ntpd not updating time
I had updated my old iMac to Mavericks just fine. I then bought a new (certified refurbished, actually) iMac and migrated everything over from a Time Machine backup.
The new iMac's clock loses ...
- 501
2
votes
2
answers
4k
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ntpd: consistently incorrect time on mid-2013 MacBook Air
I'm using ICMP time stamping on my mid-2013 MacBook Air, and I need my clock to have an accuracy of no worse than 1ms.
I see that ntpd is running, with the default settings, and /etc/ntp.conf ...
- 948
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1
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How to tell when time has been sync'ed with NTP server in Mac OS X Lion?
I know that a similar question has been asked at superuser.
But I tried to grep for "time reset" in my /var/log/system.log and I can't find any instance of it. In fact, I even searched in the eight ...
- 631
3
votes
0
answers
1k
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iPhone time sync, mobile operator vs. NTP
There is very little information how the iPhone syncs time.
From what I gather the iPhone uses the mobile operator's time through some protocol.
There is a general problem when the operator supplies ...
- 931
4
votes
1
answer
3k
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Suspicious NTPD Connection
I use Little Snitch on Mac OS X 10.6.8 and noticed a connection that seemed suspicious to me.
The snitch reported ntpd trying to connect to:
"$host 94.23.243.53
53.243.23.94.in-addr.arpa domain ...
Leigh
11
votes
2
answers
4k
views
Daily clock drift of several minutes
In the recent weeks I've noticed each morning that my clock would be behind by 2-3 minutes. I've noticed that opening the 'Date & Time' dialog from System Preferences will trigger the clock to ...
- 501