Create a bootable USB installer for macOS or OS X.

How do I use Internet Recovery Mode to install macOS or OS X on my hard drive?.

Install macOS using Internet Recovery Mode.

How do I use Disk Utility to reformat my hard drive?.

Format your new hard drive for macOS or OS X.

mini torx screwdriver set, spudgers, vacuum cups, philips screwdriver. Hardware InstallationHere is the picture of the tools I used to perform the upgrade (grounding wrist band, 6 Pc.

4.0GB PC-5300 DDR2 667MHz SO-DIMM 200 Pin Memory Upgrade Module.

MCE OptiBay Enclosure for SATA Hard Drive for iMac.

Western Digital Scorpio Blue WDBABC0010BNC-NRSN 1 TB 2.5' Internal Hard Drive.

SilverStone SDP08 2 x 2.5' to 3.5' Bay Converter.

Crucial M4 CT064M4SSD2 2.5' 64GB SATA III MLC Internal Solid State Drive (SSD).

Hardware PartsThis is the list of hardware components I ended up buying for this upgrade: To avoid the swapping I also replaced one of the 2 GB memory modules with a new OWC 4GB module, bringing the total available memory to 6GB. The solution I adopted (found on several posts on the internet) was to replace the existing SATA HDD with an SSD, and replace the optical drive with a PATA to SATA adapter hosting a 2.5in HDD. So I wanted the fast SSD drive but also to maintain the 1 TB of space available.

I own a mid-2007 24in iMac with a 2.4 GHz Intel Core 2 Duo processor, 4GB of DDR2 DRAM, running Mac OS Mountain Lion, and for the past few months the computer was getting slower and slower, and when I was running Windows XP in VMWare Fusion, the machine was often swapping, bringing the iMac to a crawl. Finally I decided to upgrade my iMac by installing an SSD. Two years ago I replaced the Western Digital 500 GB hard drive (that failed on me one day by giving me the gray screen of death at boot time), with a 1 TB WD caviar green which I almost filled since then (about 750 GB used).

Internal hard drive for imac 2007