Carry your entire desktop—including apps and settings—between different Macs.
Once booted, general navigation (browsing Finder, changing settings) feels nearly identical to an internal drive. The slowdown becomes apparent during —specifically when the system has to access thousands of tiny files simultaneously (e.g., launching a heavy app like Logic Pro or indexing Spotlight search). You will see the "spinning beach ball" more frequently. install mac os on external hard drive
Avoid high Apple upgrade prices for internal storage. general navigation (browsing Finder