The main thing I'd add is that the depreciation vs. immediate deduction split depends on whether you're filing as a sole proprietor or an LLC, and what your accountant advises for your specific situation. A MacBook Pro is generally considered a capital asset with a useful life of several years, so you'd normally depreciate it over time rather than write off the full cost in year one. Adobe Creative Suite, depending on whether it's a subscription or a one-time purchase, might get different treatment - subscriptions are usually deductible immediately since they're ongoing costs, while a perpetual license might need to be depreciated too.
There's no magic minimum threshold, but items under around $2,500 often qualify for simpler treatment under Section 179 expensing (if you're eligible), letting you deduct them all at once rather than spreading the deduction across years. The bigger gotcha is keeping solid documentation: receipts, invoices, and records showing the purchase was directly for client work. If the IRS ever questions it, you'll want to prove the laptop wasn't partly for personal use. Talk to a tax professional or CPA who works with freelancers - they can look at your actual purchases and file structure and tell you exactly how to claim everything properly. It's worth the consultation fee to get it right.