The original HDD in PowerPC Macintosh (before G3) are SCSI drives with an IDC 50 pin connector. They are often found dead and no replacement are available (or very expensive and not necessarily in a good state). They can be replaced by SCSI drives with an SCA-2 80 pin connector

iMac Late 2009 to Late 2011 are known for their GPU failure. All models are affected to a certain extent, except the 21.5" 2009 with integrated graphics only (NVidia 9400M). All other models use a ATi/AMD Radeon HD HD4000 through HD6000 series GPU which are unreliable. The

Partitioning When installing in Legacy BIOS mode, a Hybrid MBR is required. macOS Disk Utility will automatically create a Hybrid MBR when creating a MS-DOS FAT partition if it's one of the first 4 partitions on the drive. Note that the EFI partition at the beginning of the

The A1398, A1465, A1466, A1502 from 2013 to 2015 (Haswell/Broadwell) as well as A1708 machines use a FaceTime HD camera connected through a MIPI bus to a BCM15700 controller, itself connected through PCIe to the PCH. Older machines use a USB camera, newer ones have the camera handled by

In Apple schematics for at least 2011 to 2015 boards, the "ISL Version" of "S0 Rail PGOOD Circuitry" is usually no-stuff (everything with BOM option S0PGOOD_ISL should be absent from a production board). Instead, the "BJT Version" is used, as well as the

ACPI state Intel state Apple state Description Apple enable signal Power well Since platform G3 G3 G3C Mechanical off Always on with coin cell battery, main battery or AC adapter *RTC G3 G3 G3H Mechanical off Always on with main battery or AC adapter *_G3H S5 S5 S5 Soft off

First you should check if the machine is affected by https://support.apple.com/13-inch-macbook-pro-solid-state-drive-service About compatibility between 2016/2017: https://beetstech.com/blog/apple-proprietary-ssd-ultimate-guide-to-specs-and-upgrades After extensive testing with every Gen. 5A drive we could get our hands on, it appears that 128GB SSDs with part numbers beginning with 656-0074

The MacBook Air Original (Early 2008) A1237 uses 1.8" IDE drives with ZIF connector as a storage device. The HDDs are slow, not reliable and start getting expensive as working ones go rarer. There are some 1.8" IDE SSD available on Aliexpress, but they are still

Warning: some information in this article is uncertain and based onto third-party reverse engineering efforts. Official documentation from the memory controller manufacturer is required, however Intel does not make it public. This only shows the idea to narrow down the fault. Additionally, other factors such as a PCB or CPU