how to download El Capitan installer into an USB drive
My 2007 iMac (Emc 2134) running El Capitan would not boot. I replaced the 500Mg HDD with a Crucial Mx500 SSD. Now after I power up the iMac, it displays with a File icon with a question mark in it, and nothing else. The mouse seems to be working though. I search the internet for any clues or instructions to get it boot up to a stage that I could at least launch the Disk Utility. The last attempt I made was to use my Mac Book to initialize a USB for Mac OS Journaled, and tried to download the El Capitan Installer into the USB, hoping I could boot up my old iMac with this USB. But somehow my Mac Book would not allow me to download the installer, saying that the version of the current OS is too new for El Capitan. Any help or suggestions are appreciated.