[Closed] Mac help needed please.

Doesn't sound right, my mac shows one disk in Disk utility and my older ones have always shown one in DU and one under recovery.

Sounds as though you need to blow yours away, reformat the disks and then rebuild.

Maybe change the disk to a new one and rebuild on that?

I'd probably do as somouk says.

I've just had a 'fusion' drive put in my iMac to replace one that was dying - it's super snappy now.

Thanks both, I've not heard of a fusion drive, is it solid state, & what are the advantages?

I used this site - you can put in your serial number to see what upgrades are compatible.

http://www.macupgrades.co.uk/store/product_info.php?products_id=869

The Seagate SSHD range of drives are hybrid hard drives and solid state disk drives. The SSD is used to cache files that, based on past usage, the drive estimates will be accessed frequently, allowing very fast access to frequently used files.

The benefits to read speed can be substantial, but do depend on usage. A user who only boots one OS, and runs the same applications on a regular basis will see speeds very close those of a full SSD when booting and loading applications. However a user who usually accesses a wide range of data - perhaps through regularly dual booting multiple operating systems and running a wide range of applications - will be accessing much of the data from the standard 7200RPM hard drive, and will see much less benefit.

It is also worth noting that the benefits will not be seen until the SSD has cached regularly used files - so it will take a period of normal use before the benefits are seen.

A pure SSD will be faster but it's still pretty expensive to buy a decent sized one.

I'm sure some old iMacs used slow speed drives as well so a new one and especially a hybrid or SSD will make a difference.

Worth looking up the spec for your model.

My first thought was mending the harddrive with a new one, preferably an SSD or Hybrid, now that prices are more reasonable.

Thanks again, the hard drive is like this

Intel 6 Series Chipset:

Vendor: Intel
Product: 6 Series Chipset
Link Speed: 6 Gigabit
Negotiated Link Speed: 3 Gigabit
Description: AHCI Version 1.30 Supported

WDC WD1001FALS-403AA0:

Capacity: 1 TB (1,000,204,886,016 bytes)
Model: WDC WD1001FALS-403AA0
Revision: 06.01D02
Serial Number: WD-WCATR9398737
Native Command Queuing: Yes
Queue Depth: 32
Removable Media: No
Detachable Drive: No
BSD Name: disk0
Rotational Rate: 7200
Medium Type: Rotational
Partition Map Type: GPT (GUID Partition Table)
S.M.A.R.T. status: Verified
Volumes:
disk0s1:
Capacity: 209.7 MB (209,715,200 bytes)
BSD Name: disk0s1
Content: EFI
Macintosh HD:
Capacity: 999.35 GB (999,345,127,424 bytes)
Available: 919.33 GB (919,326,117,888 bytes)
Writable: Yes
File System: Journaled HFS+
BSD Name: disk0s2
Mount Point: /
Content: Apple_HFS
Recovery HD:
Capacity: 650 MB (650,002,432 bytes)
BSD Name: disk0s3
Content: Apple_Boot

Cheers.

Western Digital drive. They also came with Seagate drives. Not a simple thing to replace a drive, but if you have access to a friendly Apple Reseller, you might well be able to get a 2Tb drive installed, or even better, go for a Hybrid.
Quite a bit on't web about replacing 2011 iMac drives.

I got our IT guy at work to do it for about £40. Involves using suction cups to take the main glass cover off the screen - wasn't really up for trying to do that myself.