My Macbook Pro cannot see my Macbook when using Wifi

I have a 2009 I-Mac that is hooked to the Ethernet. When I hook my 2012 Macbook Pro to an ethernet cable I can see the I-mac. However when the macbook pro is using wireless (no ethernet) it cannot see the I-mac and the I-mac cannot see the Macbook. Both machines are running Yosemite. I have security disabled on the Linksys router. All sharing on both Macs is on. I don't have a great deal of computer experience so I am sure there are many things I have not tried.

Bootcamp - No ISO Option

There is no option in the Bootcamp wizard to choose the Windows ISO.. Any ideas?

Fast way to download a video from an URL

Is there an easy way to download a video from an URL to the device or to your Dropbox?

The only way I have managed to do that is using Mercury: manually copying the URL, going to the download manager and then pasting the URL there. Then, from Mercury I can save it to my camera roll or upload it to Dropbox.

Is there an easier way of doing this? Any way that doesn't involve copy/paste, either using Mercury or any other browse?

Loopback in Yosemite not worlking

I'm on Yosemite (10.10.2). Since upgrading I got some DNS issues, it seems my loopback isn't working any more. When I'm talking to my app locally via http://localhost:port, localhost in some cases (sorry for being vague here) gets resolved to my current local IP. (observed with rails and openstack)

some analysis:

mac:~ me$ scutil -r localhost
Reachable,Local Address,Directly Reachable Address
mac:~ me$ scutil -r loopback
Not Reachable

etc/hosts:

127.0.0.1   localhost
255.255.255.255 broadcasthost
::1             localhost 
fe80::1%lo0     localhost

etc/networks:

loopback        127             loopback-net

And a maybe related issue: DNS sometimes stops working completely. The only thing that helps, is a force quit of the discoveryd process.

I appreciate any help guiding me in the right direction to solve this issue. Thanks in advance.

Lost all my playlists with newest Version of iTunes 12.1.0.71

I have just down loaded the newest version of iTunes (12.1.0.71)on my Laptop and lost all my playlists and CD's I burned....all that is left is the music I have purchased on iTunes over the past 8 years. I called Apple support they said they were sorry but there is no way to recover your playlists.....can anyone help

How should I clean up old mailbox files?

I'm using Mail.app to read my gmail via IMAP. I recently realised that, since I have a huge amount of mail in that account, and a fairly small SSD, it would be wise to reconfigure the account the save as much storage space as possible. I've done that, but it seems the old mailbox file hasn't been removed. In particular,

~/Library/Mail/V2/IMAP-{email account}/[Gmail].mbox/All Mail.mbox

is massive: 2.9G. I believe that's a hangover from the old account that I've removed. I'm unsure whether everything else in the [Gmail].mbox is new or old, but it's all much smaller.

There's also a directory named:

~/Library/Mail/V2/IMAP-{email account}/INBOX.mbox which is much smaller (16M) and I believe represents the account I've now configured in Mail.app.

What's the best way of clearing this all up? Should I try to selectively rm individual directories, or should I just remove everything and start over? Is there a nice way to remove everything (or, ideally, purge the stuff not in use) or should I rm the directories in V2 that relate to specific email accounts (I have other accounts in use, but I'm happy to remove them and set them up again if recommended)? I'm wary about ending up with a non-functioning Mail.app - if there's a way to uninstall (including data) and reinstall the app, that might be the best option.

Where is the bluetooth antenna located in iPhones?

I posted this question on the Apple support forum, but no one could give me an answer.

I am researching iBeacons for my final year project at University and I'm interested to know the position of the Bluetooth antenna in the iPhones.

Can anybody give me a reliable source explaining where the bluetooth antenna is located on the different versions of the iPhones? iPhone 4S up to 6 plus.

Cheers.