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Helpful answers
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Jan 12, 2015 3:44 PM in response to tomstephens89by SupportForumsUser,Okay, well, I'm still okay as far as WiFi goes so there's no need for me to investigate this fix, but for those of you interested in the difference between mDNSResponder and discoveryd as it relates to DNS issues, there's an interesting fix at http://arstechnica.com/apple/2015/01/why-dns-in-os-x-10-10-is-broken-and-what-yo u-can-do-to-fix-it/.
15" MacBookPro 6,2 (Mid-2010)
OS X 10.10.2 (14C94b)
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Jan 12, 2015 7:53 PM in response to SupportForumsUserby hexdiy,My, SupportForumUser, thank you so much for your link! Duly liked.
This is exactly what I've been preaching for weeks but cannot test myselfi All command lines in the article seem to check out OK. Anyone with a genuine Yosemite WiFi problem (i.e. not a general radio issue like USB3, BT or general 2.4GHz band radio interference), go for it!
Indeed: re-post the link: http://arstechnica.com/apple/2015/01/why-dns-in-os-x-10-10-is-broken-and-what-yo u-can-do-to-fix-it/
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Jan 12, 2015 7:51 PM in response to hexdiyby jndupuis1,Cheers! mDNSResponder wins. Old school rules. Don't fix or rewrite what ain't broken.
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Jan 12, 2015 8:35 PM in response to jndupuis1by hexdiy,Indeed, "If it ain't broke don't fix it'" is my motto, has been for a very long time and will stay that way.
But for a new development here: can anyone knowledgeable here tell me whether IPsec or DNSsec has been implemented into Yosemite or into WiFi routers?
Hardware/ firmware incompatibilities may well be the common denominator in some Yosemite WiFi malfunctions reported here.
And IP or DNS secure are relatively new...
http://en.wikipedia.org/wiki/IPsec
http://en.wikipedia.org/wiki/Domain_Name_System_Security_Extensions
If Yosemite follows DNSsec and/or IPsec and your WiFi hardware does not follow, you may be fried...
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Jan 12, 2015 9:01 PM in response to hexdiyby jndupuis1,I upgraded my previous Linksys E2500 Router to the Linksys EA3500. This allows me to take advantage of Mac GB Ethernet. Where I am IPv6 is not here. My upgraded Modem and Router is ready for it. And...just may be why I have success with Internet Protocol and Wireless g/n.
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Jan 13, 2015 1:40 AM in response to hexdiyby PFJ30,As ever a fascinating read but again as ever too scared to action as am not practiced in EDDs, clones etc
HOpefully Apple now know the problem if they didn't before
BTW is anybody else suffering the extra capital letter at the beginning of sentences in these posts?
IS it a recent issue?
APologies I was referring to this article http://arstechnica.com/apple/2015/01/why-dns-in-os-x-10-10-is-broken-and-what-yo u-can-do-to-fix-it/
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Jan 13, 2015 1:44 AM in response to hexdiyby PFJ30,CCan you expand on your reference to BT? Is there evidence that BT home hubs are part of the problem? I am largely unable to connect to my 5Ghz bw
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Jan 13, 2015 2:23 AM in response to PNWmacby rickfromadelaide,These settings worked for me.
1. Set the DNS on your computers wireless network preferences to 8.8.8.8 and 8.8.4.4
2. Open your routers administration page, change your security settings to WPA2 and encryption to TKIP + AES
3. Save the new settings then restart the router.
Some users report just using AES works for them but TKIP + AES is backwards compatible with devices that just use WPA.
Good luck
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Jan 13, 2015 2:55 AM in response to tomstephens89by ayrtonf1,Hi all,
FYI:
iMac (27-inch, Mid 2011) / 2.7 GHz Intel Core i5 / 12 GB 1333 MHz DDR3 / AMD Radeon HD 6770M 512 MB
with OS X Yosemite 10.10.2 Build 14C78c same wifi issues.
with OS X Yosemite 10.10.2 Build 14C81f, wifi issues were fixed.
with OS X Yosemite 10.10.2 Build 14C94b, still running flawlessly.
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Jan 13, 2015 9:03 AM in response to hexdiyby PFJ30,A little wary of running latest seed - not convinced I have the mentality to backup, update, run, backup from TimeMachine if I hit a problem. I do have my old HDD which I recently replaced with an SSD - how easy is it to make myself "safe" i.e. recoverable from a Seed disaster?
My nervousness compounded by the realisation that Migration Assistant? OS10 Internet recovery? did not work properly during SDD install - itunes/iPad is copying all iPad app purchases to MBP after telling me it wasn't authorised then when I authorised telling me it was
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Jan 13, 2015 10:20 AM in response to hexdiyby PFJ30,Slightly off track maybe: is 100% plus CPU usage by Notifications Centre indicative of anything?
Notification Center 160.4 9:13:20.50 3 0 357 pauljohnson30 36 KB 24.0 MB 11.8 MB 297 14.3 MB 0 bytes 0 bytes 64 bit - No 0 bytes 0 bytes 0 0 0 bytes 0 bytes No No No Process Name % CPU CPU time Threads idleWakeUps PID % CPU very volatile - jumps to 170, drops to 145 in seconds, repeatedly
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Jan 13, 2015 12:08 PM in response to PFJ30by hexdiy,That may be indicative of your Mac being in the process of downloading a very large update, Paul. Is it? After the download CPU activity will probably drop dramatically.
I do have my old HDD which I recently replaced with an SSD - how easy is it to make myself "safe" i.e. recoverable from a Seed disaster?
Buy an external enclosure or a Sharkoon (like) SATA dock for your old HDD. You can always altstart from that. Furthermore, next to the usual Time Machine Copy, I find it reassuring to make a bootable clone in Carbon Copy Cloner or SuperDuper. The former has a very functional demo version. Good luck!
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Jan 13, 2015 12:26 PM in response to hexdiyby PFJ30,nmope Hex, no downloading going on ... Unless iPhoto synch via ITunes counts?
current count 166.4
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Jan 13, 2015 2:09 PM in response to PFJ30by hexdiy,That may count, not sure though. Maybe check your Activity Monitor as to what is eating CPU cycles. And if you really want to test, just switch off your BT and Airport for a while- after syncing, of course. CPU usage back to normal after that? Good luck!
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Jan 13, 2015 6:13 PM in response to hexdiyby hexdiy,And an instructive blog: http://meandmymac.net/2014/06/5ghz-wifi-networking-revisited/