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10 votes
2 answers
5k views

How can I "bump" my system clock by fractions of a second on macOS for ham radio time keeping needs?

I'm running Ventura 13.4 on an M2 MacBook Air. I run the FT8 and FT4 digital modes for ham radio. FT8/4 requires fairly accurate time synchronization. It seems that macOS gets out of sync when waking ...
Paul Cezanne's user avatar
0 votes
0 answers
838 views

How to update time with sntp using ntp.conf file

After the recent daylight saving time change, my macOS (Sonoma v14.1.1) clock no longer shows correct date and time. When I enable "Set date and time automatically" it reverts to January 22, ...
mabalenk's user avatar
  • 131
0 votes
1 answer
75 views

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 ...
Kokizzu's user avatar
  • 893
4 votes
2 answers
3k views

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 ...
Volsk's user avatar
  • 3,070
6 votes
2 answers
2k views

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 ...
Space Code's user avatar
1 vote
0 answers
364 views

`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), ...
Steve Summit's user avatar
0 votes
1 answer
4k views

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 ...
leeand00's user avatar
  • 1,633
4 votes
2 answers
6k views

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 (...
Jim Bruce's user avatar
0 votes
1 answer
3k views

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 ...
WGroleau's user avatar
  • 5,065
16 votes
0 answers
25k views

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 ...
bman's user avatar
  • 365
2 votes
2 answers
4k views

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,...
Alex Ryan's user avatar
  • 857
3 votes
1 answer
6k views

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 ...
srinath's user avatar
  • 161
2 votes
1 answer
1k views

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:...
Steve's user avatar
  • 151
1 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. ...
David Sýkora's user avatar
2 votes
1 answer
3k views

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 ...
David Sýkora's user avatar
4 votes
1 answer
5k views

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 ...
Uflex's user avatar
  • 141
22 votes
1 answer
52k views

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 ...
Basil Bourque's user avatar
1 vote
1 answer
401 views

How do iPhones acquire date and time?

Do iPhones and iPads with cellular network support NITZ or do they only rely on NTP?
bot47's user avatar
  • 7,762
1 vote
1 answer
1k views

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. ...
peetonn's user avatar
  • 655
3 votes
1 answer
2k views

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 ...
tom's user avatar
  • 31
0 votes
1 answer
446 views

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, ...
Thufir's user avatar
  • 241
1 vote
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?
Gobblin's user avatar
  • 11
2 votes
5 answers
3k views

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 /...
user105994's user avatar
10 votes
3 answers
10k views

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 ...
Pascal Cuoq's user avatar
3 votes
2 answers
10k views

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 ...
RandomGuy's user avatar
3 votes
1 answer
5k views

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 ...
robo's user avatar
  • 916
0 votes
1 answer
489 views

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 ...
hoss's user avatar
  • 2,637
1 vote
0 answers
174 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 ...
danorton's user avatar
  • 329
1 vote
2 answers
4k views

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 ...
Nima's user avatar
  • 143
68 votes
6 answers
85k views

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 ...
bmike's user avatar
  • 238k
6 votes
1 answer
5k views

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 ...
Chad Decker's user avatar
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 ...
Scott's user avatar
  • 895
19 votes
5 answers
24k views

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 ...
Paul J. Lucas's user avatar
2 votes
2 answers
5k views

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 ...
cnst's user avatar
  • 998
5 votes
1 answer
4k views

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 ...
Kal's user avatar
  • 681
3 votes
0 answers
2k views

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 ...
mist's user avatar
  • 931
4 votes
1 answer
3k views

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 ...
user avatar
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 ...
noffle's user avatar
  • 511