The Apple Mac mini "Core Solo" 1.5 features a 1.5 GHz Intel "Core Solo" (T1200) processor, a 2 MB on-chip level 2 cache, a 667 MHz frontside bus, 512 MB of 667 MHz DDR2 SDRAM (PC2-5300) memory, a 5400 RPM, 60 GB Serial ATA hard drive, a slot-loading 8X single layer DVD/CD-RW Combo Drive, and an "Intel GMA950 graphics processor with 64 MB of DDR2 SDRAM shared with main memory."

Connectivity includes DVI (DVI-to-VGA adapter included) and Firewire "400", four USB 2.0 ports, combined "optical digital audio input/audio line in" and combined "optical digital audio output/headphone" minijacks, a 10/100/1000Base-T Gigabit Ethernet port, and built-in AirPort Extreme (802.11g) and Bluetooth 2.0+EDR. It lacks an internal 56k modem, but an external Apple USB Modem can be purchased for US$49.

Like the Mac mini G4 models, the internal components are cleverly enclosed in a tiny and elegant 2.9 lb, 6.5 inch square, two inch tall case with a built-in speaker and an external power supply.

The Mac mini "Core Solo" 1.5 also included an Apple Remote for use with Apple Front Row media organization software. The Mac mini "Core" systems shipped without a display, keyboard, or mouse, but numerous Apple and third-party options are available.