installer information on the recovery server is damaged macos sierra

I've been doing stuff like this for many many years. Then select the external drive and hit return. When you need to switch boot, connect the external drive and boot with the option key held down CONTINUOUSLY until the startup manager appears. Follow through and set up a basic account.

When done, you'll be presented with the initial startup screen (choose your language). Then launch the installer and 'aim it' at the EXTERNAL SSD (NOT the internal drive).Įxpect the Mac to restart one or more times, and the screen may go dark for a minute or two. Open the image, launch the pkg file (I'm going from memory), and it will put the Low Sierra installer into your applications folder. Then download a copy of Low Sierra from Apple, see this page: You can either buy a ready-to-use USB3 SSD, or get a 'bare' 2.5' SATA SSD and an enclosure, something like this:įor 10.12 'Low' Sierra, format it for HFS+ (Mac OS extended with journaling enabled, GUID partition format). Instead, get a smallish-sized USB3 SSD drive (256gb should be fine even 128gb might do well enough), and install a copy of Sierra onto that. I recommend that you DON'T partition the internal drive. User groups like those on Reddit will likely provide more support. Instructions are not hard to find but generally require learning how to modify an installation file-not that hard and you might learn what Apple purposely hides from users who mostly do not want to know about these things anyway. Everything since Snow Leopard can run on the X86 CPU in your machine. There are ways to circumvent the artificial restrictions Apple places on running older or newer versions of macOS. Parallels is the easiest to use virtual machine app for macOS but not the only one. The other option, but it eats up the limited storage space on your Air, might be to install Parallels and run the second OS in a virtual machine. USB keys of all ilk, with rare and expensive exceptions, have very slow read/write times for running an operating system. You can save money inserting an SSD into an enclosure rather than buying a premade. I agree that the best option is to install a second OS on a USB 3 SSD. I keep a Macbook Pro on Mojave because the 32 bit copy of Office on it is more valuable to me than anything in newer versions of macOS.

Installer information on the recovery server is damaged macos sierra