A software engineer successfully ran Meta's Llama 2 generative AI model on a 20-year-old PowerBook G4, demonstrating how well-optimized code can push the limits of legacy hardware. MacRumors' Joe Rossignol reports: While hardware requirements for large language models (LLMs) are typically high, this particular PowerBook G4 model from 2005 is equipped with a mere 1.5GHz PowerPC G4 processor and 1GB of RAM. Despite this 20-year-old hardware, my brother was able to achieve inference with Meta's LLM model Llama 2 on the laptop. The experiment involved porting the open-source llama2.c project, and then accelerating performance with a PowerPC vector extension called AltiVec. His full blog post offers more technical details about the project.

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Apple has refreshed its MacBook Air lineup with the M4 processor, adding a new sky blue color option and reducing prices across the board. The 13-inch model now starts at $999, while the 15-inch begins at $1,199. Both models are available to order immediately and will ship on March 12. The updated MacBook Airs feature the same thin design as previous generations but now include the 12-megapixel Center Stage webcam found in current MacBook Pro models. Both variants come with the M4 chip, aligning them with Apple's recent Mac Mini, iMac, and MacBook Pro refreshes. Base configurations include an M4 with a 10-core CPU and 8-core GPU, 16GB of unified memory, and 256GB of storage. Customers can upgrade to a 10-core GPU (matching the base 14-inch MacBook Pro), 32GB of RAM, and up to 2TB of storage. A significant technical improvement is the support for two external 6K displays while keeping the laptop's lid open, addressing a limitation of previous Air models.

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