How to share my mac and external hdd?

Hey
I was wondering about something.
I have a mac at home, with an external HDD connected. Is there some way that i can get access to the mac HDD and external HDD through the web from another computer (probably a PC)? The thing is that i often can't bring my MacBook with me, and therefore has to access some files from remote access. I have had a look on several guides, but they don't solve the problem, as i don't have the "FTP-sharing" tab in System Preferences -> Sharing.
Any way to solve this? Btw, my mac is connected to a pretty fast broadband, so the connection is no problem.
Greetings
Sixmax

Here are some links that may assist:
http://discussions.apple.com/message.jspa?messageID=5589585
http://discussions.apple.com/thread.jspa?messageID=5601760
/p

Similar Messages

Folder size comparison in Mac and external HDD.

Hello there,
I have a Macbook pro, I'm trying to backup files and folders from my Mac to an external Hard disk (FAT32).
When I check the folder in my Mac, it is 25MB and 75 items. When I copy the folder to an external hard disk and check the size, it shows 18MB and 88 items.
What's the reason for this difference? Size reduces but number of items increases. Is this an odd behavior or normal? What makes the number of items to be increased?
Any information would be appreciated.
Thanks,
Ram

Here are some links that may assist:
http://discussions.apple.com/message.jspa?messageID=5589585
http://discussions.apple.com/thread.jspa?messageID=5601760
/p

Itunes library is on a mac formatted external hdd: can windows recognize it

subject pretty much says it all. can windows recognize my mac formatted external hdd? i know when i had my ipod formatted to windows, the mac recognized it, but will the mac formatted drive allow windows to see it, play the music, and possibly move it to my ipod?
thanks!!!

Default, Windows will not recognize Mac formatted disks.
A number of applications can enable Windows to read them.
Take a look at this page: http://www.macwindows.com/disks2.html
I don't have experience with any of the apps. mentioned on that page, so I can't tell you how they perform.
Maybe posting in the iTunes for Windows forum will result in specific information.
M

Is it possible to make OSX see the internal and external HDD's as one large drive?

Is it possible to make OSX see the internal and external HDD's as one large drive? For instance, hypothetically, could I have a Mac Mini Server with 2TB of internal storage and 2 external 4TB Thunderbolt HDD's, and make the OS see them all as one large 10TB drive?

Yes it is possible to do this, but this is not recommended since a disconnection of the external drives would lead to a destabilized system. Its best to do this only with internal drives, or secondarily with only external drives that are set up separately from the boot drive.
However, if you do wish to do this then you can combine any local set of volumes into one large "spanned" hard drive using Apple's CoreStorage volume management service. It does take a few steps to set up and requires use of the Terminal and Disk Utility. Here is a tutorial on how to do this: http://reviews.cnet.com/8301-13727_7-57550128-263/how-to-make-a-custom-corestora ge-drive-in-os-x/

Backup multiple Macs to external HDD

I have an iMac (OS X 10.8.2) with a new Seagate BackupPlus external HDD attached by thunderbolt. The external HDD has 5 partitions (all Mac OS X Extended Journaled format). 4 partitions are dedicated back ups for 4 Macs (the iMac connected via thunderbolt to the external HDD, plus 3 MacBookAirs (MBA's)). The 5th partition is just for storing random data (I realize TM won't back up the data on the same drive as the TM backups, but that's ok).
Following the steps FAQ #22 on the great pondini site http://pondini.org/TM/22.html I was able to set up Time Machine to back up my iMac (with the external HDD physically attached) AND I was able to setup TM on my MacBookAir (also running OS X 10.8.2) to wirelessly back up to the external HDD attached to the iMac.
I am now trying to do the same for wife and kids MBA's (i.e., get them to have TM back up wirelessly to the external HDD that is attached to the iMac on the same network). However, while I can get TM to backup my MBA, I can't get their to work, even though I followed the same steps on their "source" MBA's as I did on mine. The other MBAs can see the external HDD (attached to the iMac) and even remotely read/write to it (which I did as a test). TM on their MBA sees and lets me select the appropriate partition on the external HDD, but when I try to do a backup, after a few seconds TM stops running. It may be worth noting I also have TM backing the MBAs (including wife and kids MBAs) wirelessly to a TimeCapsule too... and that works flawlessly (I am trying to get my MBAs backed up on both my TimeCapsule and an external HDD connected to the iMac, so I have two backups).
The error log from TimeMachine Buddy on my wife's MBA shows:
Starting manual backup
Attempting to mount network destination URL: afp://melaniebernitz@Bradley%E2%80%99s%20iMac._afpovertcp._tcp.local/Mel%20MBA% 20External%20Backup
NAConnectToServerSync failed with error: 80 for url: afp://melaniebernitz@Bradley%E2%80%99s%20iMac._afpovertcp._tcp.local/Mel%20MBA% 20External%20Backup
Attempting to mount network destination using URL: afp://[email protected]/Mel%20MBA%20External%20Backup
NAConnectToServerSync failed with error: 80 for url: afp://[email protected]/Mel%20MBA%20External%20Backup
Backup failed with error: 19
To try and fix, I have:
-- rebooted both machines.
-- ran "Verify Disk" on external HDD partition (verify disk finds no issues)
-- checked file sharing on iMac (again, the MBA's can read and write to the external HDD connected to the iMac with no problems so it has read/write/share "access" to the external HDD)
-- did full reset of Time Machine preference on my MBA per pondini.org/TM/A4.html
-- on the MBA's that won't back up wirelessly to the external drive, I can still "see" and select the external HDD (connected to the iMac) in Time Machine
-- tried running TM from different users on each MBA (including adminstrators, of course)
-- have shut off and re-turned on Time Machine
In case it helps diagnose the issue, here's the TimeMachine Buddy log for the my MBA (for which TM successfully completes the wireless backup to the external HDD on the iMac).
Starting manual backup
Attempting to mount network destination URL: afp://bradley%20katcher@Bradley%E2%80%99s%20iMac._afpovertcp._tcp.local/Brad%20M BA%20External%20Backup
Mounted network destination at mount point: /Volumes/Brad MBA External Backup using URL: afp://bradley%20katcher@Bradley%E2%80%99s%20iMac._afpovertcp._tcp.local/Brad%20M BA%20External%20Backup
Resizing backup disk image from 924.24 GB to 923.9 GB
Disk image /Volumes/Brad MBA External Backup/Brad MacBook Air.sparsebundle mounted at: /Volumes/Time Machine Backups
Backing up to: /Volumes/Time Machine Backups/Backups.backupdb
Using file event preflight for Macintosh HD
Will copy (1.4 MB) from Macintosh HD
Found 63 files (1.4 MB) needing backup
626.4 MB required (including padding), 779.13 GB available
Copied 973 files (1.5 MB) from volume Macintosh HD.
Using file event preflight for Macintosh HD
Will copy (Zero KB) from Macintosh HD
Found 11 files (Zero KB) needing backup
624.8 MB required (including padding), 779.13 GB available
Copied 248 files (82 bytes) from volume Macintosh HD.
Created new backup: 2013-02-09-013813
Starting post-backup thinning
No post-back up thinning needed: no expired backups exist
Backup completed successfully.
Ejected Time Machine disk image: /Volumes/Brad MBA External Backup/Brad MacBook Air.sparsebundle
Ejected Time Machine network volume.
So, to make a long story short, even though the external HDD partitions are mounted and can be read by all MBA's....
-- My MBA has no problem backing up (via TM) to the external HDD physically attached to my iMac
-- Other MBA's can wirelessy back up (via TM) to TimeCapsule on my network, but NOT to the external HDD on the iMac (even though they can remotely see/share files on it).
All in all, I'm at a loss as to why it works for one MBA but not others (since I followed same steps to set up the MBA's for TM).
Any thoughts would be greatly appreciated
Thanks

Bkat wrote:
The external HDD has 5 partitions (all Mac OS X Extended Journaled format).
What Partition Map Scheme does it have? (click the top line for the drive in Disk Utility's sidebar -- it will be shown at the lower-right). It should be GUID, but should work if it's APM (Apple Partition Map). If it's MBR (Master Boot Record), a Windows setup and often the way externals come from the factory, that may be the problem. I've never been sure of the details, but there's a message somewhere that says "not all partitions may be accessible" to Time Machine with MBR.
-- tried running TM from different users on each MBA (including adminstrators, of course)
It doesn't matter what user does the setup, or even does a Back Up Now, since the actual backup runs with "root" privileges (permission to everything). It sounds like you have the right Sharing setup on the iMac, but be sure each of those Macs is connecting as the right user on the iMac.
I've not done this myself with multiple Macs (I don't have enough hardware); only one Mac backing-up to a shared drive on another.
Attempting to mount network destination URL: afp://melaniebernitz@Bradley%E2%80%99s%20iMac._afpovertcp._tcp.local/Mel%20MBA% 20External%20Backup
Looks like you've got some special characters in some names. I realize two Macs seem to back up ok, but oddly enough, sometimes such characters in names are a problem -- they'll work fine sometimes, but not always. See #C9 in Time Machine - Troubleshooting.
(I am trying to get my MBAs backed up on both my TimeCapsule and an external HDD connected to the iMac, so I have two backups).
You might want to reconsider using Time Machine for both sets of backups. It's prudent to want two separate backups in case one piece of hardware fails. But what if there's a problem with Time Machine itself, on one (or more) of your Macs? TM is pretty reliable, but no app is perfect. See Time Machine - Frequently Asked Question #27 for details, and the green box there for some alternatives (some of those may not work over a network. CarbonCopyCloner and ChronoSync do -- I use CCC locally, in addition to TM, but not over a network).
Message was edited by: Pondini

How to share the Mac folder to open windows without password?

como compartilhar pasta do mac para abrir no windows sem senha?
how to share the Mac folder to open windows without password?

No easy way. Unless you use the same username and the same password on both system then you have to enable Windows File Sharing (SMB) in Sharing, add your Mac username and type in your password in the options of Sharing and then set a NetBIOS name and a workgroup name that is the same on both Windows and Mac. That is in the Network section under advanced WINS tab.

How to share user login and passwords between blog, forum and Dreamweaver?

I have a site created with Dreamweaver. I want to allow
visitors to create a username and password which will allow them to
post blog feedback to many pages on my site, post in a forum, and
provide their own comments into a database I can show the results
for on certain pages. The trick is I want this to all work with one
username and password so they don't have to use 3 different logins.
I'm not sure if this is too technical, but I thought I'd ask before
getting into it and realizing it won't work or I don't have a clue
what I'm doing.
I want to allow blog data to be added to a page with CSS
content by both admin and visitors (to create an active discussion
based on the data on that page). I've seen it on some sites, but
don't know how to do it myself:
http://www.joystiq.com/2008/05/19/ea-extends-take-two-purchase-offer-deadline-a-third-time /
I can see they are using Weblogs Inc. software, but it
appears the company only collaborates with people they see a fit
with.
I also want a forum and I know phpp is recommended. I like
the interface, but am unsure if the login data can be shared with a
blog.
Lastly, I wanted to allow users to write their own reviews
and then show the results and average them for display on the site.
I have read and know how to create the database for the site. I
just don't know how to share the usernames and password information
with the blog and forum.
Also, how do I force Dreamweaver to validate that the
usernames and passwords are exactly correct before letting people
post under that identity?
I'm loving Dreamweaver and making sites so far. Just trying
to take it to the next level.
Thanks very much!

juxtafras wrote:
> I have a site created with Dreamweaver. I want to allow
visitors to create a
> username and password which will allow them to post blog
feedback to many pages
> on my site, post in a forum, and provide their own
comments into a database I
> can show the results for on certain pages. The trick is
I want this to all
> work with one username and password so they don't have
to use 3 different
> logins. I'm not sure if this is too technical, but I
thought I'd ask before
> getting into it and realizing it won't work or I don't
have a clue what I'm
> doing.
>
> I want to allow blog data to be added to a page with CSS
content by both admin
> and visitors (to create an active discussion based on
the data on that page).
> I've seen it on some sites, but don't know how to do it
myself:
>
>
http://www.joystiq.com/2008/05/19/ea-extends-take-two-purchase-offer-deadline-a-
> third-time/
>
> I can see they are using Weblogs Inc. software, but it
appears the company
> only collaborates with people they see a fit with.
>
> I also want a forum and I know phpp is recommended. I
like the interface, but
> am unsure if the login data can be shared with a blog.
>
> Lastly, I wanted to allow users to write their own
reviews and then show the
> results and average them for display on the site. I have
read and know how to
> create the database for the site. I just don't know how
to share the usernames
> and password information with the blog and forum.
>
> Also, how do I force Dreamweaver to validate that the
usernames and passwords
> are exactly correct before letting people post under
that identity?
>
> I'm loving Dreamweaver and making sites so far. Just
trying to take it to the
> next level.
>
> Thanks very much!
>
What you want is a CMS, but your not going to get one for
Dreamweaver,
well, not the kind you want. Something like Joomla can do
this, you can
add phpBB3 to it, and then using the JFusion extension allow
them to
share the user database, but I warn you now, its a steep
learning curve.
I ended up buying a book just to get to grips with the key
concepts.
Steve

Is it better to daisy chain an apogee duet and external hdd or...

...setup an audio interface and external hdd to two separate bus ports? I ask because I going to be purchasing gear to set up my first home recording studio and I am torn between the MacBook Pro 15" and 17". The 17" comes with an Express Card slot (which I could use to utilize more bus ports), but is less portable and a little more expensive. The 15" is ideal in size, but lacks two firewire ports and Express Card possibilities. I know firewire is a must for a 7200 rpm external drive, but I have read very negative reviews about USB powered audio interfaces. Is daisy chaining a good idea? Are USB as bad as I've come to understand in terms of clarity and quality? Is the 17" my best option? I am looking at a starter's interface, like an Apogee Duet. The new Apogee One looks intriguing, but again, it is USB.

+1 for daisy-chaining Duet to Glyph. For audio work the 17" is the best option these days. The ExpressCard slot is invaluable for using Universal Audio plugins or powering an additional firewire device above and beyond the audio interface/hard drive, such as the Focusrite Liquid Mix.

[Forum FAQ] Removable media and external HDD

Scenario
There are two conceptions about which we would have confusion in some particular scenarios: removable media and external HDD. Here are two examples:
If you need to make a USB storage device perform AutoRun, the device must not be marked as a removable media device and the device must contain an Autorun.inf file and a startup application.
Answer File Search on removable read/write media.
Definition and Research
The definition of the removable media and external HDD is shown below:
The removable media device setting is a flag contained within the SCSI Inquiry Data response to the SCSI Inquiry command. Bit 7 of byte 1 (indexed from 0) is the Removable Media Bit (RMB). An RMB set to zero indicates that the device is not a removable
media device. An RMB of one indicates that the device is a removable media device. Drivers obtain this information by using the StorageDeviceProperty request.
External HDDs typically connect via USB; variants using USB interface generally have slower data transfer rates when compared to internally mounted hard drives connected through SATA.
That is, the removable media has a device property attach itself, from the results on Linux and Windows OS, we can see the difference between removable media and
generic external disk:
Here are the outputs of dmesg log on Linux OS:
sd 10:0:0:0: [sdb] Attached SCSI disk
(generic external disk)
sd 2:0:0:0: [sdb] Attached SCSI removable disk
(USB flash drive)
Here is the output on Windows OS:
We use following command to get the media type of physical drive:
Get-WmiObject -Class Win32_DiskDrive | Format-Table Name,Model, MediaType
Conclusion
From the device’s property, we cannot say that external device is equal to removable media totally. Removable media is associated with the RMB flag, of course, RMB is embedded in device itself.
Now, back to our common issue, when you supply an answer file on a USB external HDD, it would not recognize your device as a removable media, because the StorageDeviceProperty gets value 0 of RMB to indicate this is not a removable media. In this situation,
supply an answer file on a USB flash drive (UFD) or floppy disk would fix this issue.
Please click to vote if the post helps you. This can be beneficial to other community members reading the thread.
Please click to vote if the post helps you. This can be beneficial to other community members reading the thread.

Ive had it on my Ibook before and then moved it to the HDD because of Space Shortage, and then just added as ive aquired more music. Idon't Really Remeber but i think it worked before without any hiccups. oh well otherwise i can just delete those files because theyre only single files here and there. but its quite irritating because they don't seem to have any kind of corruption.

How to handle data whilst reformatting HDD and external HDD

Hi folks,
I'd like to reformat my external HDD (200GB) back to one partition from two. I'd also like to reformat my Mini's HDD (160GB) back to one partition (I don't want the windows partition).
My personal data on the Mini HDD is about 2.7GB, so that's easily put to a DVD for reinstallation afterwards, and I'm sure an archive installation will be relatively idiot proof.
The data on the external HDD is all my music and photos, plus data backups, some software, and some installers etc. In total, it's around 136GB.
With the windows partition on my Mini taking up 16GB, I have available space on the Mac formatted partition of 104GB.
I had the idea to borrow a friend's new and unused external HDD, with the thought simply to drag my data there, but it was with the promise that I reformat it back to Windows NFTS for him, which I think I find is not supported from OSX 10.4, so I can't use his kit.
Can anyone see a trick I'm missing, before I go and burn onto twenty-odd DVDs, and whilst on that subject, is there an inbuilt Mac OSX process for burning my data - I can't see a burn option from within the windows when I'm navigating to the external HDD?
Many thanks,
Matt

Thanks for the suggestions.
My friend already had to return the first drive, which his PC wouldn't recognise, and this unit is the replacement, straight from its sealed box, so I can't put him anywhere near that dark place again after he's done me a favour...
Unfortunately, the computer disk space isn't sufficient: I have 136GB of data held externally, and only 120GB available locally, plus at near 100% capacity, I wouldn't want to trust the OS not to fall over.
I can see that I can copy a large proportion of it over to the Mini, which reduces DVD burn, but again, is there a quick DVD burn from external HDD? Can't see much of use in Disk Utility.

How do you file share between mac and pc?

i need to know how one can share files between a mac and a pc. my MBP is running os x 10.5.2 and my PC is running vista.
thanks!

Mac/Windows Networking in Leopard
The following articles outline how to set up networking between Macs using Leopard and Windows PCs:
Setting up a Windows computer to share files with Mac users
Setting up a Mac computer to share files with Windows users
Sharing with Windows computers
If you can’t connect to your Mac from a Windows computer
Sharing your computer with others on your network
More information is also available by selecting Mac Help from the Finder's Help menu and searching for the relevant terms such as "windows", "networking", "sharing", etc.
Also read:
Simple guide to Leopard/Windows Home Networking
Written by Intercepter121 and originally posted on the Apple Discussions here.
If your network complies to the minimum requirements described below you should be able to share resources without any need to enter commands in the terminal to modify configuration files in your mac.
Requirements
1. A decent router
2. Mac Os x 10.5.1 installed on your macs
3. Windows XP or Vista
4. Number of network devices <10
5. Some network printers or drives (NAS)
6. A decent ISP offering a good DNS service
<u>General Settings
If your router offers DHCP and any of the device has power saving features there is a risk that the IP addresses are renewed. This can be problematic as the devices keep changing IP addresses. As this is your network is strongly recommended to reserve IP addresses to the MAC (Machine Address Code) of the various devices so that they can power on and off and still keep the same IP.This simple suggestion will greatly improve the browsing of the local network.
Accessing Windows Resources from Leopard with no authentication
Windows
1. Check the settings of the PC and ensure the IP addresses on the local LAN are trusted
2. Activate sharing on the desired devices ensuring the shares are read and write. If you use Vista ensure password protected sharing is disabled.
3. Try to access the windows share from another windows computer if available to confirm no authentication is required
MAC
1. Go into system preferences->security-Firewall check that the setting is not on allow only essential services. Recommended settings is allow access to specific
2. Go back into system preferences network. On the tab location click edit locations. Duplicate Automatic and call the new location Home. Now select the Home location and go into Advanced-WINS. In the workgroup field enter the same value that is on the other windows computers for example HOME. Now press enter then go back to the main screen. Select Edit locations and delete the location automatic. Now edit your location Home and rename it Automatic. This workaround is a leopard bug described here.
3. Give 5 minutes to allow all the other machines to broadcast their IP address and the other computers should appear on the left side of your finder window. You can now select the shares you want to connect. As no authentication is active if you are prompted with a user name just press OK.
The procedure to access a NAS is the same as above, just ensure permissions are set to files are read/write for anyone to avoid confusion.
NOTE: There is no need to activate SMB sharing if you don't want to allow the PC to read folders on your MAC
Troubleshooting
After you have followed all the steps you don't see any windows PC.
Identify the IP address of the machine you want to connect. In finder select Option+K and enter SMB://IPADDRESS. If you can connect you have a name resolution problem. Go into your router configuration and ensure that the option DNS assigned by ISP is selected and you don't have services like Open DNS in use and fixed IP addresses in that field. Apply the changes and reboot the router. You should start seeing windows PC in finder shortly after.
Your ISP DNS service is poor and you must use Open DNS or similar
If you are forced to use services like open dns you have the risk that the router propagates the DNS servers to your machines. As the implementation of SAMBA in Leopard effectively blocks the MAC to be a master browser for performance reasons you end in a situation in which tiger machines connect and leopard ones don't see a single share. Let's fix it.
1. Go into System Preferences->Network then advanced DNS if you see here the IP addresses of the open dns servers this is the case. Unfortunately you will be forced to change the hosts file.
2.Ensure you have reserved IP addresses to all your machines so that they always get the same IP.
3. Now login into your mac as administrator and go into utilities=>terminal.
4. Issue the following command sudo pico /etc/hosts
5. Now scroll down and enter all the IP addresses and computer names of any device you want to browse
6. Reboot your MAC
The windows devices will now appear in finder and you will be able to connect with Option+K.
You cannot access shares even entering the IP address
You have not reserved IP addresses to each machine. Go into your router LAN set up and make sure that is the case.
Accessing Leopard resources from Windows
1. Go into system preferences->security-Firewall check that the setting is not on allow only essential services. Recommended settings is allow access to specific
2. Go into System preferences->accounts and click on Guest flag the option Enable guest account to access shared folders
3. Now into System preferences->sharing select file sharing and then options here flag SMB and select the user that has to be logged into the computer when the share has to be accessed. Ensure that the folder you want to share has read/write or whatever permissions you like it to have set for Everyone
You should now be able to see your MAC in the windows network resources and access the shared folder with a double click without any password request.
Troubleshooting
You don't see any MACs from Windows
Check the firewall settings at the start of this post. Then go back to the Network configuration hit advanced and then TCPIP check is using DHCP and not a fixed address. Then check the sharing is set as above with SMB clicked. If SMB is not set you won't even see your mac from windows.
You see the MAC and the shared folders but you can't read or write on it
Ensure you have set the guest account to access shared folders. Then check on the sharing preferences that there is at least one folder with read permission for everyone. The classic case here is Dropbox that leopard sets as read and write for the user of the MAC but no access for other users. You try to click on drop box and receive an error but when you actually try to write a file you can do it. Check the permissions on the subfolders of the share as those permissions will prevail on the home shared folders
FAQ
You may want to do more complicated things, but first ensure you can actually share files without security in place so you can identify the root cause of your possible problems
I want to password protect my windows shares: once you have done the relative set up in windows vista and ensured you can connect from another windows machine you will need to use user name and password of the Vista user to connect.
I want to password protect my MAC shared folders: Go into user account and disable guest access to shared folders is no shared folder has to be accessed without password otherwise leave it checked. Create a new user for sharing (better than giving away your password) so that this user only accesses the folders you want to share. In System preferences network select file sharing SMB and flag only the new user you have defined. Then go back to the folder section and set the permissions you like on the folder you want to share for this newly defined user.
Good Luck

How do I back up an external HDD AND my macbook to another external HDD using Time Machine?

Hi,
My little old Macbook is pretty slow and clunky at the moment and I have decided to transfer my iphoto library to an external HDD named 'photos'.
I've check, it's all there - present and correct.
I've removed 'iphoto' from my 'pictures' folder on my macbook to trash.
I've tried to back both macbook and photos HDD to time machine but I'm unable to recover the photos HDD.
I have opened TM preferences, selected options and excluded the 'photos' HDD from backups as I was under the impression that the drive shown in the window is the drive used by TM.
Can somebody help me please. I've tried to recover a photo, just to test the backup but unable to find anything.
Kind regards
T

If I understand you correctly you want to back up two drives simultaneously. If that is correct, you will find a guide here: http://pondini.org/TM/32.html

Imac and external hdd

im trying to boot from external hdd and efi bios does not even see the external hard drive!!!!
i work at the educational facility and i just got 40 imacs that have to be cloned!!!
doing every one of those by hand would be a nightmare.
does apple actually provide any tools except netboot and netinstall that would help me with the quest?
any tricks i have to do on the mack to recognize external drive as a boot drive?

A good source for how to do netinstalls is www.bombich.com.
You fail to tell us anything about this external drive, how it's formatted, what's installed on it, etc. The general rundown is:
You need to partition the external drive using the GUID partition scheme. If the external drive has never been formatted before then format the drive Mac OS Extended (Journaled.) This should be done using the OS X Installer Disk One that came with the computers. If the computers are all the exact same model then you only need use one of the installer discs. However, if you have different hardware, then each different model has a different build of OS X. You will need two different external drives or you will have to update the system on the external drive to one that will be common for all the models you have (this would be 10.4.8 (Intel).
Here's the procedure:
Extended Hard Drive Preparation
1. Boot from your OS X Installer Disk. After the installer loads select your language and click on the Continue button. Then select Disk Utility from the Installer menu (Utilities menu for Tiger.)
2. After DU loads select your external drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Set the number of partitions from the dropdown menu (use 1 partition unless you wish to make more.) Click on the Option button and select the GUID partition map and click on OK. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the volume(s) mount on the Desktop.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled, if supported.) Click on the Options button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process will take 30 minutes to an hour or more depending upon the drive size.
After formatting is completed quit DU and return to the installer. Now quit the installer. The computer will reboot. After reboot clone the system on the iMac to the external drive:
How to Clone Using Restore Option of Disk Utility
1. Open Disk Utility from the Utilities folder.
2. Select the backup or destination volume from the left side list.
3. Click on the Erase tab in the DU main window. Set the format type to Mac OS Extended (journaled, if available) and click on the Erase button. This step can be skipped if the destination has already been freshly erased.
4. Click on the Restore tab in the DU main window.
5. Select the backup or destination volume from the left side list and drag it to the Destination entry field.
6. Select the startup or source volume from the left side list and drag it to the Source entry field.
7. Double-check you got it right, then click on the Restore button.
8. Select the destination drive on the Desktop and press COMMAND-I to open the Get Info window. At the bottom in the Ownership and Permissions section be sure the box labeled "Ignore Permissions on this Volume" is unchecked. Verify the settings for Ownership and Permissions as follows: Owner=system with read/write; Group=admin with read/write; Other with read-only. If they are not correct then reset them.
For added precaution you can boot into safe mode before doing the clone.
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How to recover lost files on external HDD

Hello all, I gave my external HDD (G Drive, I bought it from the app store), as far as I see the model ist something like - HDST HTS 5410, to a friend and the dumm *** deleted all my old files (movies, fotos) and put new ones. So my question is how to restore/recovery if possible. Thank you and really hope there is a chance.

General File Recovery
If you stop using the drive it's possible to recover deleted files that have not been overwritten by using recovery software such as MAC Data Recovery, Data Rescue II, File Salvage or TechTool Pro. Each of the preceding come on bootable CDs to enable usage without risk of writing more data to the hard drive. Two free alternatives are Disk Drill and TestDisk. Look for them and demos at MacUpdate or CNET Downloads. Recovery software usually provide trial versions that enable you to determine if the software would help before actually paying for it. Beyond this or if the drive has completely failed, then you would need to send the drive to a recovery service which is very expensive.
The longer the hard drive remains in use and data are written to it, the greater the risk your deleted files will be overwritten.
Also visit The XLab FAQs and read the FAQ on Data Recovery.
Your files were most likely overwritten, so don't expect too much success at recovering them.

NEW Macbook air and external HDD with windows files

Hi,
I just bought (2 days ago) my first MAC (finally). After so many years of working with windows it was time to get of the dark side . Anyway, this is not my first time around apple products (I had iphones and ipads) so I know some basic stuff like iCloud, keychain etc. I bought 13inc macbook air, 128 GB SSD.
Now this is my problem:
Although I worked on a windows computer I was saving all my files (work related, movies, music, tvshows, photos- a lot of them) on my external HDD (500 GB). Now, when I transfered to Mac I would like to have my Word, PPT and music files on my mac but not the photos, those I would like to keap on my EHDD. Can this actually work without some work around file extensions and EHDD formating? Can I use my EHDD like this? I know that it is both for Windows and MAC (it was written on the box).

I depends in what format the external drive is formatted as to how easy this is going to be.
I bet there is a good chance it is NTFS. If so, some moderately bad news. The Mac OS can read it, but not write to it natively, unless it is a networked drive.
Sure, you can add third party functionality to the Mac, so it will write to the external drive, but I would avoid it if possible. If your drive is already formatted FAT 32, or ExFAT, then you can perform cross platform reading and writing, without issue.
Fortunately we live in a time where most external drives are now relatively inexpensive. If you don't want to, or can't reformat that drive, because you have no space to put the files in the interim (I hope they are not just in place, anyway), consider buying a new external drive for sharing purposes.
Just my 2 cents.

How to share my mac and external hdd?

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