Upgrade of base model iMac 21.5
Why is my iMac so slow all of a sudden?
What parts can I upgrade on my iMac?
No display and no chime.
Dit is een aantal algemene gereedschappen dat gebruikt wordt om aan dit apparaat te werken. Je hebt niet elk stuk gereedschap voor elke procedure nodig.
Background and Identification
The iMac Intel 21.5" EMC 3068 was released in June 2017 as a lower-spec alternative to the 4K Retina Display iMac from the same year. The budget (comparatively) model comes with a 1080p display and an Intel i5 series processor. It has USB-A ports and Thunderbolt ports on the back for a variety of input options. You can identify this machine by looking under the stand for the model number “A1418” and the EMC number “3068.” The model number was shared by multiple iMacs, but the EMC number is unique to this version. If you open the System Information application in macOS, the computer will also be identified as the “iMac 18,1.”
At purchase, this iMac can be configured with 8 GB or 16 GB of memory. Surprisingly, this memory is not soldered to the logic board, but is actually upgradeable to a maximum of 32 GB. Unfortunately, Apple did not make it easy to get into the machine, and opening the chassis requires cutting adhesive around the screen. They also did not cover the power supply inside, so handling this component can potentially be dangerous. There is a guide for this procedure, however, which shows how to remove the power supply without exposing yourself to shock.
The computer also comes with a 2.5-inch hard drive or fusion drive inside. This component can be replaced, but again it requires removing the display. If you’re up to the task, however, replacing the hard drive with a faster SSD is one of the best speed-increases you can provide for this machine. Interestingly, this iMac was available at purchase with an SSD built-in, but in this case the SSD actually uses a PCIe slot in the computer. Only the models that shipped from the factory with an SSD have this extra-fast slot inside.
- Intel Core i5-7360U
- 2.3 GHz with Turbo Boost up to 3.6 GHz
- Two cores, 4 threads
- 8 GB or 16 GB at sale (upgradeable to 32 GB)
- Two slots
- 2133 MHz DDR4
- Hard drive models:
- 1 TB hard drive (5400 rpm)
- or 1 TB fusion drive
- SATA interface
- 2.5-inch form factor (7 mm thickness)
- SSD models:
- 256 GB SSD
- PCIe interface
- Intel Iris Plus Graphics 640
- 21.5 inches (54.6 cm)
- 1920x1080 pixels
- Two Thunderbolt 3 ports (USB-C)
- Four USB 3 ports
- Gigabit Ethernet
- SDXC card slot
- 3.5 mm headphone and microphone jack
- Kensington lock slot
- 802.11a/b/g/n/ac Wi-Fi
- Bluetooth 4.2
- Facetime HD camera
- 1280x720 resolution
iMac (Intel-based) on Wikipedia
iMac (2017) specifications on Apple Support