Macbook can't see external HD connected to iMac

Hello,
I just bought a Macbook and set it up with my iMac on the wireless network. Everything else works fine, but my Macbook can't see the external drive that is connected to my iMac. I want to be able to back up the Macbook to the drive. I tried turning on file sharing on the iMac and adding the LaCie drive to the list of shared folders, but its still not showing. Is there something I need to change or configure to get it to show up?
Thanks

I believe this Airport update, released in the spring (2008) did enable AirDisk usage with Airport Extreme wireless devices:
http://www.apple.com/support/downloads/timemachineandairportupdatesv10.html
MacWorld: Update allows Time Machine backups on AirPort Extreme
http://www.macworld.com/article/132613/2008/03/airporttime.html
Unfortunately, it is Mac OS X 10.5 (Leopard) only, and I see form your stats that you are still on Tiger (10.4).
It will be interesting if Tadd's tip works though. Let us know.
Cheers!

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Hi guys,
I personally figured it out on why this problem occur, well let me just hit to the point.
What happens is that the router of the wifi channel is being changed automatically or someone might accidentally changed it. MBP can't detect wifi from certain wireless channel. So, we have to change the channel of the router wifi channel that may be detectable by your MBP.
THE SOLUTION -
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It appears an SMC reset was required:
HT5815 I've just done the 10.8.5 update on my MacBook Pro end of 2008, and WiFi don't work after reboot... Impossible to activate it...
Here is your other post: MacBook can't see my home wireless network after upgrade to OSX 10.8.5
If you reply to it and marked it "solved", perhaps with a link to that post (copy and paste it, or just say you performed the SMC reset) it will help others find a solution. Thanks!

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Put the more recalcitrant computer into Target Drive mode by starting it with the T key down until you see the yellow on blue screen. Then connect it to the other machine by firewire cable while both are already awake.
I hope that you did not do any upgrades while you had external drives connected... that is an automatic problem. Always disconnect from externals and accessories before doing any upgrades. Always back up before doing any upgrades.
Firewire networking is not the same as using a computer in Target Disc mode. In Target disc mode, you are using the internal drive of the Td computer as an external. That should allow you to run disk utility. Do use the proper disc utility version for the OSX version that is on problem drive. ie don't use the Leopard disc utility for the Tiger disc or vice versa.

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Hi there,
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thanks!

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My second macbook can't see my external drive.

I have the following setup:
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-Macbook Pro that is wirelessly connected to my home network
-a 500g HD connected directly to my Macbook Pro that I am using for Time Machine.
Initially, I was having issues with my Macbook Pro successfully completing a backup. My Macbook (which is not physically connected to my external HD) had no problems backing up. After a great deal of frustration, I decided that there may be some problems with my HD so I reformated and repartitioned the drive to a single drive with journaling. Fortunately, now my Time Machine works with my Macbook Pro but I'm having major issues with my Macbook.
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Welcome to the discussions forum Mightymice.
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Hi, I'm hoping someone can help, as I have seen similar questions in the forums, but not with an answer that helps me solve my problem.
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http://www.phonenews.com/toshiba-acknowledges-macbook-woes-canvio-usb-3-0-hard-d rives-18699/
Toshiba Acknowledges MacBook Woes in Canvio USB 3.0 Hard Drives
By Christopher Price on December 27, 2011
Following tests conducted by PhoneNews.com, Toshiba has acknowledged an issue affecting their Canvio USB 3.0 hard drives. The issue prevents current-generation MacBook Pro and MacBook Air models from properly connecting and powering up the drives.
Read more to see our findings, and the resulting (ongoing) investigation by Toshiba.
We began our tests based on tips from readers like you, and went out and purchased five (yes, five) Canvio USB 3.0 drives, along with a brand new 2011 MacBook Air.
Drive problems happened immediately, and were relatively isolated to the MacBook Air. Of all the systems we tested on, we were only able to reproduce issues on a Sony VAIO laptop late in our testing, as well as a current-gen MacBook Pro.
Essentially, the drives failed to mount, and in most tests never even spun up on these systems.
The Canvio USB 3.0 hard drives have sat under many people’s Christmas trees, as they were hot sellers during Black Friday. Retailers like Office Depot slashed prices on the slim, 2.5-inch drives down to $79 for a 1TB hard drive. With coupons, Radio Shack was selling the 500GB model for a mere $39.
Canvio USB 3.0 drives tout on the box compatibility with USB 2.0 systems, including both Mac and PC. The advantage of a Canvio USB 3.0 hard drive for a MacBook owner lies in Thunderbolt. Purchasing such a drive today can achieve USB 3.0 speeds with upcoming Thunderbolt-to-USB 3.0 adapters. USB 3.0 mass storage was designed to be fully backwards compatible with USB 2.0.
To get to the bottom of the problem, we probed the five Canvio drives purchased, in an effort to better understand the issue. And, we were able to isolate the problem; the Canvio USB 3.0 drives draw more power than the USB standard permits. The drives were drawing, upon connection, slightly more than the five watts that the spec allows. And, the new MacBooks appear to promptly shut the device down because of this.
Why? Well, Apple can assert that this is to protect the MacBook Air/Pro from a malfunctioning USB device. However, the answer really lies in tablets. Apple allows iPad and MacBook to perform a hardware handshake, which then allows Apple devices to draw 10 watts from the USB port. This is why you can charge an iPad directly on a Mac, but not on a PC.
Apple does not want to allow rival tablet manufacturers (Android) to have the same access to Apple’s USB port. Hence, any device (like a tablet) that wants to draw even slightly more than five watts, is shut off from communicating with the Mac. We affirmed this by testing a powered USB hub. With a powered hub connected to the hard drive, and the hub connected to the MacBook, the drive instantly came to life, and worked without issue.
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Hi,
I'm want to backup BOTH my Macbook Pro (Retina) and my Mac Mini (Late 2012) to an external hard drive (Western Digital My Passport) USB-connected to the Mac Mini.
Alas, this doesn't work. I can't figure out why. The Mac mini finds the disk with no problems and can backup to it via Time Machine. But when I open Time Machine on the Macbook Pro, it can only backup to the Mac Mini. That's the only location it finds; it can't find the external disk.
I've enabled file sharing and shared the external disk, and set it to be available for guests to read/write. I've even bought OS X Server and used the same configuration there (although it seems to sync it from the Mountain Lion config anyway). Still nothing, the macbook can't find the external disk, only the Mac mini itself.
What could be the problem? All guides I find is about backing up to the Mac Mini over wifi. I don't want the backups on the Mini, but on the external disk connected to it.
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Nope, but I see the Mac Mini as a network volume. And from it I can access the external drive (and everything else on the Mini).
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Macbook can't see time capsule through airport utility; powerbook can.

This question probably applies to Airport Extremes as well as Time Capsules, but I happened to see it with a new TC.
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An update: I can see the Airport configuration of the TC through my Macbook if I pick File->Configure Other... on the Airport Utility, and then put in the IP address. Which leads me to believe that it's a Bonjour issue, but I haven't figured out more than that.
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My iMac was able to ping the MacBook eventually (after 22 timeouts, it eventually got a few high round-trip pings that lowered shortly thereafter), but it is still unable to see the MacBook in the Shared devices list.
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ping 192.168.2.3
PING 192.168.2.3 (192.168.2.3): 56 data bytes
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Request timeout for icmp_seq 22
64 bytes from 192.168.2.3: icmp_seq=11 ttl=64 time=12338.226 ms
64 bytes from 192.168.2.3: icmp_seq=12 ttl=64 time=11341.133 ms
64 bytes from 192.168.2.3: icmp_seq=13 ttl=64 time=10341.974 ms
64 bytes from 192.168.2.3: icmp_seq=14 ttl=64 time=11452.557 ms
64 bytes from 192.168.2.3: icmp_seq=15 ttl=64 time=10718.590 ms
64 bytes from 192.168.2.3: icmp_seq=16 ttl=64 time=9799.987 ms
64 bytes from 192.168.2.3: icmp_seq=17 ttl=64 time=8798.967 ms
64 bytes from 192.168.2.3: icmp_seq=18 ttl=64 time=7803.687 ms
64 bytes from 192.168.2.3: icmp_seq=19 ttl=64 time=6802.503 ms
64 bytes from 192.168.2.3: icmp_seq=20 ttl=64 time=5818.710 ms
64 bytes from 192.168.2.3: icmp_seq=21 ttl=64 time=4818.158 ms
64 bytes from 192.168.2.3: icmp_seq=22 ttl=64 time=3816.990 ms
64 bytes from 192.168.2.3: icmp_seq=23 ttl=64 time=2815.664 ms
64 bytes from 192.168.2.3: icmp_seq=24 ttl=64 time=1828.492 ms
64 bytes from 192.168.2.3: icmp_seq=25 ttl=64 time=828.307 ms
64 bytes from 192.168.2.3: icmp_seq=26 ttl=64 time=9.865 ms

Macbook can't see external HD connected to iMac

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