This was introduced in Catalina for Mac but it's been in iOS for quite some time. macOS Catalina is built on a different drive partition scheme, the APFS file system. For that reason, make sure you follow the steps exactly as outlined. The preparatory steps are very important because if you don't get them right, the time spent on the rest of the process will be completely wasted and you'll have to do it all over again. To instal Catalina on external SSD, there are quite a few things you should set up previously. Notice: The SSD you are going to use or purchase should be compatible with your Mac. Seagate One Touch SSD External 1TB (USB 3.0, $144.99).Samsung X5 Portable SSD 500GB (Thunderbolt 3, $199.99).SanDisk 500GB Extreme Portable External SSD (USB-C, $84.99).Below is a list of best external SSDs for Mac:įurther reading: How to check hardware port on your Mac Besides, the volume should be 128 GB or larger. To maximize the performance of SSD, it should be USB 3.0 compatible, if you have enough budget, ThunderBolt port is more welcome as it has much faster reading and writing speed. So not all external SSDs are suitable for Macs. It has its own hardware port and unique standards. Mac computers are made different from PCs. How to Pick up the Right External SSD for Catalina If you use a larger-capacity SSD, this will allow you to load a ton of heavy apps like Photoshop and so on, which might not be possible with your current hard drive because it is already full of data. It's also possible that you want to run a different set of apps and, therefore, need more memory.Instead of installing Catalina on both, you have the flexibility of simply connecting the SSD to one of the Macs when you want to boot from it. ![]() Since your SSD is essentially an external drive that is portable, you may want to switch it between one Mac and the other. You may want to have the SSD run macOS Catalina on more than one machine.This way, you can update it as new versions are released, then install it as your main OS when you're happy with the stability of the software. Since there are bound to be bugs in early versions of any new OS, you might want to avoid the hassle of having it as your default OS.You are looking for a way to boost the performance without untouching the internal drive. Your Mac (Mostly Mac Mini or iMac) is built upon on a HDD and it runs slowly. ![]() Uninstalling and rolling back to an older version of macOS is time-consuming and a tedious process that is prone to errors, so you may not want the hassles that come with it.
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