15994 Views 85 Replies Latest reply: Mar 2, 2012 7:59 AM by tomotello
Currently Being ModeratedNov 22, 2010 8:04 PM (in response to showbizmanager)I never found a solution to this. Have you?Mac Pros, Mac OS X (10.5.7), Final Cut Pro and (dare I say it) Avid.
Currently Being ModeratedNov 22, 2010 8:05 PM (in response to loyed256)@showbizmanager
I am also in Nashville, TN. Comcast as well, anything work?iPhone 4, iOS 4, iMac
Currently Being ModeratedNov 22, 2010 8:52 PM (in response to tcreasy)Comcast came today and gave me a new modem. He apparently said "Alot of people with Apples have been having this problem and we've been trying to tell the senior tech guys"
I'm going to try and download the Tom Tom app at 1.5 GB. I'll let you know if it works.
GinaiMac, Mac OS X (10.6.4)
Currently Being ModeratedNov 23, 2010 8:39 AM (in response to showbizmanager)I don't think this has to do with Comcast modems. I am having the same issue trying to download large files and I am on ATT U-Verse.Mac OS X (10.5.8)
Currently Being ModeratedNov 23, 2010 8:51 AM (in response to LeKnober)This is looking more and more like an APPLE problem. Let's bombard Apple Support with this issue and quote this forum thread. I'm in touch with a senior tech named Scott: firstname.lastname@example.org - perhaps you can write to him and concur that we're all having a similar issue with different service providers.iMac, Mac OS X (10.6.4)
Currently Being ModeratedNov 23, 2010 9:00 AM (in response to showbizmanager)Feel free to have Scott contact me if he thinks it would be useful. I am happy to provide info. It happens on files that are very large only. WoW big patch updates, XCode developer tools dmg, etc...Mac OS X (10.5.8)
Currently Being ModeratedNov 23, 2010 9:04 AM (in response to LeKnober)Yeah, I know. I can't install the new iPhone4 update. I get a message that says "Data Corrupted"
Could this be a virus of some kind? It's happening on all three of my Apple computers in my office.iMac, Mac OS X (10.6.4)
Currently Being ModeratedNov 23, 2010 9:10 AM (in response to showbizmanager)I think its very unlikely to be a virus. The reason is that most people are able to successfully download by switching internet connections to a different network. Its also unlikely to be a virus since it only affects large files and not smaller ones. I am able to download 70MB files just fine.
I was also able to successfully download XCode in the past by switching from WiFi to direct ethernet but that could have just been coincidence.Mac OS X (10.5.8)
Currently Being ModeratedNov 23, 2010 9:15 AM (in response to LeKnober)That's another question we had. Apple gave me a new airport extreme and it still happens. I've tried plugging in direct and it still happens. Going to a Starbucks to update my stuff today.iMac, Mac OS X (10.6.4)
Currently Being ModeratedNov 25, 2010 8:23 AM (in response to showbizmanager)I'm having this exact same problem (in Nashville) and it's driving me crazy. I moved in with a friend at the beginning of this month and suddenly all of my updates were crashing. The internet itself is fine - browsing, speed tests, every kind of diagnostic I could think to run looks fine.
I have switched out routers, tried a direct ethernet connection and even gone as far as plugging directly into the modem. Every time large downloads end up corrupted. My Playstation 3 is also getting corrupt downloads. The only thing left is the Arris modem or the Comcast network itself - is there any way to test the modem? My previous modem had some diagnostic tools but this one just seems to have status pages.
I took my MacBook to work and got the update to install just fine. I am going to try the PS3 at another location as well.
Based on what I've tested, this is not an Apple issue. It is a Comcast issue. I just spoke to a rep there who of course said it wasn't them...I would hate to have to get a tech out here and then have him check the signal and say everything's fine.
I've been trying to resolve this for almost a month now and I hope we can get something figured out soon.
Message was edited by: stateside_MacBook, Mac OS X (10.6.5)
Currently Being ModeratedNov 25, 2010 10:16 AM (in response to stateside_)Well, I think this is what we know so far:
1) Its not limited to Comcast. I am experiencing the same thing with AT&T UVerse.
2) Its not a virus, since it works on different ISPs on the same machine.
3) Its not a hardware defect on the Mac since it works on the same machine with different connection.
So what we are left with is one of the following:
1) A software problem on the Mac that is only triggered with very large downloads and on certain connections.
2) An ISP issue, where they are throttling or performing some other manipulation on the data that is causing problems on Macs. So far we have identified Comcast and UVerse as two ISPs with problems.
3) Corrupt files stored on Akamai servers which Apple uses to distribute downloads faster by geographic region and ISPs. So if Akamai is doing something that is causing the large files to be corrupted, then going to another ISP might work because it would talk to a differnt Akamai server and it would appear as if changing ISPs helped even though that wasn't the actual issue.Mac OS X (10.5.8)
Currently Being ModeratedNov 26, 2010 8:45 AM (in response to LeKnober)I guess 2 is the most likely answer. The strange thing is I've lived in Nashville for 6 years now and never had any problems like this with Comcast. The only difference is I just moved into a house that also has a phone line with them, so the cable modem is a different type - I'm not sure if they treat it any differently on their network.
@comcastcares (their customer support twitter) has been really good about checking things out in the past, so I asked them to look into it. I'll let you know if they come back with anything useful.MacBook, Mac OS X (10.6.5)
Currently Being ModeratedNov 27, 2010 11:59 AM (in response to showbizmanager)I'm living in nashville zip code 37211 with comcast and have the EXACT same issue. With my PCs it's CRC errors on large files. On my macs it's the invalid checksum. My neighbors have AT&T U-verse and if I'm on their network with my mac laptop I STILL have the same issue.
Here's what I do know for sure.
1.) This is cross platform OSX and Windows 7
2.) I have ruled out bad network cables. I upgraded to cat6 over cat5e and haven't seen much improvement.
3.) This is only happening in certain areas of nashville.
4.) I have been on both Comcast business class with an SMC modem and Comcast residential with an SB6120 modem and have had the exact same issue.
5.) I did NOT have this issue with the 5120 motorola running at 30mbps speed. This all started to happen when I upgraded to the 100mbps speed.
So a question to everyone on the thread with this issue... what zip code? and what speed tier is your internet. We just have to get to the bottom of this because it's becoming an increidble hassle just to upgrade firmware for iphone and download the 10.6.5 update at 1gb for a single download. Not one of my macs has completed the upgrade successfully!iMac 27", Mac OS X (10.6.5)
Currently Being ModeratedNov 27, 2010 12:04 PM (in response to admiraljdn)one more thing. is everyone with the issue running 64 bit mode?iMac 27", Mac OS X (10.6.5)
Currently Being ModeratedNov 27, 2010 12:45 PM (in response to admiraljdn)I tried it on two different machines in my house, one was running 10.4.x and the other 10.6.5. Both were unable to download successfully. I am in California on ATT UVerse.
So we now can eliminate an OS bug, unless the OS bug has prevelant since 10.4, which is possible of course. But if you say it happens on PCs also, then that points to either the router or the ISP.
I am using an Apple Airport Extreme to distribute connections from the UVerse router. Has anyone tried direct connecting to the router for downloads?Mac OS X (10.5.8)