I understand you want your iTunes library to be hosted on your main machine but not on your Lion machine. Bit of confused there.
FIRST OF ALL. Back-up all of your calendar, address book, etc. data before you proceed for any inconveniences that may happen.
Anyway. For migrating your calendar, contacts, notes & etc. :
- use the export features of those apps storing them on Snow Leopard machine and then import them to your Lion machine,
- reset address book & calendar on your iOS devices by connecting them to your Snow Leopard machine and un-checking syncing of those data and finally syncing them for changes to take effect,
- setup iCloud on Lion and also on your iPhone and iPad so that you can sync those information with your iPhone and iPad.
NOTE: don't sync them through iTunes when you are on Lion because if you do so your iPhone and iPad will be wiped and then re-synced as you've said because those devices can be synced with only one iTunes library at a time. Since you won't be taking your musics with you, those will be gone if you sync through iTunes. Just use iCloud. But this also means that you won't be able to sync music and any other kind of media to your iPhone and iPad until you return to your Snow Leopard machine.
After your return then you should:
- export those up-to-date calendar, address book, etc. info. on Lion,
- import them to your SL,
- remove iCloud on everything,
- return back to old fashioned iTunes syncing.
I know it's a bit of a hassle but it's your only option as far as I can see right now if you don't want to move your iTunes library to your Lion machine.
BUT if you choose to move your iTunes Library as well then you may follow Apple's guides here to do so. And be careful when you're migrating. Don't just copy&paste since iTunes' structure is complicated.
If you migrate then you can sync your calendar, address book, etc. through iTunes. But you gonna have to export&import those to your Lion machine as well. So the first option stands out.
If you've any other questions, just let me know.
Since the update told you it failed, you might need to re-apply the update by connecting to a wired network or downloading the whole update from another computer if yours is off the network.
Be sure to download the 10.8.4 Combo updater and re-apply the update to be sure the drivers all installed properly and no pieces of your software were missing or corrupted. Since normal updates are a delta (only the changed items get written), it's a slim chance that something odd happened and a re-install of the patch might help fix things up for you.
Once you've gotten the OS X update installed, should the problem persist, you can troubleshoot it as normal. The two avenues I would pursue to troubleshoot this would be to dig into Wireless Diagnostic first to see if it can identify your issue.
- /System/Library/CoreServices/Wireless Diagnostics.app
This tool is substantially better on 10.8.4 than it was on previous versions (when it was called Wi-Fi Diagnostics) and it has helped me solve several tricky network issues already.
The second would be to go into the Network preference pane and clear all known wireless network settings:
- Network Preference Pane
- Wireless
- Advanced
- Delete all preferred networks
- Then make a new "test" location and try re-joining the affected network (or joining another network to ensure this isn't just a coincident failure of the wireless card and not related to the update)
Best Answer
The red circle with dash or a minus sign in it refers to a folder to which you do not have permissions to see the contents of. The folder you are specifically showing in that screenshot are System files owned by the root/system. You shouldn't attempt to modify, move or delete these files as they are important to your operating system and that is why the permission has been set.
To answer your question, yes it's completely normal, it's likely that its just logging errors, system activity or even a programs activities, it's nothing that you need to be worried about, it's just standard system operations.